Whirlpool 1997 "E" User's Manual

SERVICE MANUAL
for the
OVER-THE-RANGE
MICROWAVE OVEN HOOD
COMBINATION
1997 “E” Models
March, 1997
Printed in U.S.A.
LIT4322167
THIS MANUAL CONTAINS INFORMATION NECESSARY FOR SERVICING THE WHIRLPOOL MICROWAVE OVEN HOOD COMBINATION , MODELS:
MH7130XE
MH7135XE
MH9115XE
THE MANUAL IS DESIGNED TO BE USED ONLY BY
QUALIFIED SERVICE PERSONNEL. THE SERVICE
INFORMATION IS ORGANIZED TO HELP YOU EASILY FIND WHAT YOU NEED.
CHECK YOUR LOCAL BUILDING CODE FOR THE
PROPER MODE OF INSTALLATION. IN THE ABSENCE OF LOCAL CODES, THIS UNIT SHOULD BE
INSTALLED IN ACCORDANCE WITH THE NATIONAL
ELECTRICAL CODE, ANSI/NFPA NO. 70 - 1990, OR
LATEST EDITION, OR C22.1 CANADIAN ELECTRICAL CODE, PART 1.
This Microwave Service Manual is for authorized WHIRLPOOL SM service technicians only.
Because of the high voltage and the critical nature of the door closure system for the microwave
oven, Whirlpool recommends that customers DO NOT service their own microwave oven.
If you encounter problems with any Whirlpool range having a microwave feature, call your nearest
authorized WHIRLPOOL SM Service Company for service.
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Cooking Products Service Manual
Original March, 1997
4322167
© 1997 Whirlpool Corporation
Page iii
TABLE OF CONTENTS
Page
Important Safety Information ............................................................................................................................... v
Theory Of Operation ......................................................................................................................................... 1-1
Component Access ........................................................................................................................................... 2-1
Component Sections .................................................................................................................................. 2-1
General ............................................................................................................................................................... 2-2
Removing The Microwave Oven & Cabinet ............................................................................................ 2-2
The Protection Control System ....................................................................................................................... 2-4
Removing The Oven Door ......................................................................................................................... 2-4
Removing The Oven Door Components .................................................................................................. 2-5
Removing The Control Panel .................................................................................................................... 2-6
Removing The Line Fuse ........................................................................................................................... 2-7
Removing/Adjusting The Interlock Switches .......................................................................................... 2-8
Removing The Base Thermal Fuse ........................................................................................................ 2-10
Removing The Magnetron Thermal Fuse .............................................................................................. 2-11
Removing The Convection Thermistor .................................................................................................. 2-12
Removing The Cavity Thermal Fuse ..................................................................................................... 2-14
The Operating Control System ...................................................................................................................... 2-15
Removing The Oven Light Socket .......................................................................................................... 2-15
Removing The Control Circuit Board & The Turntable Indicator Circuit Board .............................. 2-16
Removing The Fan Motor ........................................................................................................................ 2-17
Removing The Power Cord ..................................................................................................................... 2-18
Removing The Blower Motor Capacitor ................................................................................................. 2-19
Removing The Convection Heating Element ........................................................................................ 2-20
Removing The Gas Sensor ..................................................................................................................... 2-22
Removing The Stirrer Motor .................................................................................................................... 2-23
Removing The Turntable Motor .............................................................................................................. 2-24
Removing The Cooktop Light Sockets .................................................................................................. 2-25
The High Voltage Components ..................................................................................................................... 2-26
Accessing The Components .................................................................................................................... 2-26
Removing The Magnetron ....................................................................................................................... 2-27
Removing The High Voltage Rectifier And The High Voltage Capacitor ......................................... 2-28
Removing The High Voltage Transformer ............................................................................................. 2-29
iii
Page
Component Description & Testing .................................................................................................................. 3-1
Important Safety Instructions .................................................................................................................... 3-1
The Thermal Fuses ..................................................................................................................................... 3-4
The Blower Motor Capacitor ..................................................................................................................... 3-5
The Gas Sensor .......................................................................................................................................... 3-6
The Convection Thermistor ....................................................................................................................... 3-7
The Convection Heating Element ............................................................................................................. 3-8
Motors ........................................................................................................................................................... 3-9
Programming Checks ............................................................................................................................... 3-10
Charts ......................................................................................................................................................... 3-11
Checking The Microwave Power Output ............................................................................................... 3-14
Checking For Microwave Energy Leakage ........................................................................................... 3-15
Component Testing .................................................................................................................................. 3-18
Control Circuit Board Checklist .............................................................................................................. 3-23
Primary, Monitor, & Secondary Switch Checkout Procedure ............................................................. 3-24
Tech Tips ............................................................................................................................................................ 4-1
Wiring Diagrams .......................................................................................................................................... 4-1
Strip Circuits ................................................................................................................................................ 4-3
Specifications .............................................................................................................................................. 4-6
Model & Serial Number Explanation ...................................................................................................... 4-15
Whirlpool Microwave Hood Warranty ..................................................................................................... 4-16
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Cooking Products Service Manual
Original March, 1997
4322167
© 1997 Whirlpool Corporation
Page v
IMPORTANT SAFETY INFORMATION
This service manual is intended for factoryservice technicians only. We recommend that
customers DO NOT service their own units,
because of the complexity and risk of highvoltage electrical shock.
WARNING
Fire Hazard
Do not obstruct the flow of ventilation air.
The following information is used throughout
this manual, and should be read carefully.
Electrical Shock Hazard
NOTE
It is the customer’s responsibility to:
• Contact a qualified electrical installer.
• Assure that electrical installation is adequate and in conformance with the National Electrical Code, ANSl/NFPA 70—
latest edition*, and all local codes and
ordinances.
Helpful information that explains a more
complicated step, prior to carrying it out.
CAUTION
Failure to do so could result in fire, electrical
shock, or other personal injury.
Information that will help you avoid actions
that could cause product damage (scratches,
dents, etc.) and damage to personal property.
Take special care when drilling holes into
the wall for venting or electrical wiring. Electrical wires may be concealed behind the
wall covering.
Failure to do so could result In fire, electrical shock, or other personal injury.
WARNING
• National Fire Protection Association
Batterymarch Park
Quincy, Massachusetts 02269
Information that alerts you to potentially
dangerous conditions. These conditions can
cause serious personal injury (burns, fire
and electrical shock, etc.) if the suggested
procedures are not observed.
WHIRLPOOL ASSUMES NO RESPONSIBILITY
FOR ANY REPAIRS MADE ON OUR PRODUCTS
BY ANYONE OTHER THAN AUTHORIZED
WHIRLPOOL SERVICE TECHNICIANS.
v
CAUTION
WARNING TO SERVICE TECHNICIANS
To avoid possible exposure to microwave radiation or energy, visually check the oven for
damage to the door and door seal before
operating the oven. Use your microwave survey meter to check the amount of leakage
before servicing. In the event that the R.F.
Ieakage exceeds 4 mw/cm 2 at 5 cm, appropriate repair must be made before continuing to
service the unit. Check interlock function by
operating the door latch. The oven cook cycle
should cut off before the door can be opened.
• Proper operation of the microwave ovens
requires that the magnetron be properly
assembled to the waveguide and cavity.
Never operate the magnetron unless it is
properly installed.
The door and latching assembly contains the
radio frequency energy within the oven. The
door is protected by three safety interlock
switches. Do not attempt to defeat them. Under no circumstances should you try to operate the oven with the door open.
• Untrained personnel should not attempt
service without a thorough review of the test
procedures and safety information contained
in this manual.
• Be sure the “RF” seal is not damaged, and
assembled around the magnetron dome
properly when installing the magnetron.
• Routine service safety procedures should
be exercised at all times.
PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO AVOID POSSIBLE EXPOSURE TO
EXCESSIVE MICROWAVE ENERGY.
1.
Do not operate or allow the oven to be
operated with the door open.
2.
Make the following safety checks on all
ovens to be serviced before activating the
magnetron or other microwave source,
and make repairs as necessary:
3.
check the magnetron, wave guide or transmission line, and cavity for proper alignment, integrity, and connections.
a) Interlock Operation.
b) Proper Door Closing.
c) Seal and Sealing Surfaces (Arcing,
Wear, and Other Damage).
d) Damage to or Loosening of Hinges and
Latches.
e) Evidence of Dropping or Abuse.
Before turning on microwave power for
any service test or inspection within the
microwave generating compartments,
vi
4.
Any defective or misadjusted components
in the interlock, monitor, door seal, and
microwave generation and transmission
systems shall be repaired, replaced, or
adjusted by procedures described in this
manual before the oven is released to the
owner.
5.
A microwave leakage check to verify compliance with the Federal performance
standard should be performed on each
oven prior to release to the owner.
6.
Do not attempt to operate the oven if the
door glass is broken.
Cooking Products Service Manual
Original March, 1997
4322167
© 1997 Whirlpool Corporation
Page vii
CAUTION
Whirlpool microwave ovens have a monitoring
system designed to assure proper operation
of the safety interlock systems.
WARNING
The interlock monitor switch will immediately
cause the oven fuse to blow if the door is
opened while the following combined failure
exists:
DISCONNECT FROM POWER SUPPLY
BEFORE SERVICING.
CAUTION: HIGH VOLTAGES ARE
PRESENT DURING THE COOK
CYCLE. EXTREME CAUTION
SHOULD BE OBSERVED AT ALL
TIMES.
Primary door interlock switch and/or secondary interlock switch contacts failed in a closed
position.
CAUTION: REPLACE BLOWN
FUSE WITH 15 AMPERE CLASS H
FUSE ONLY.
CAUTION: DO NOT TOUCH
OVEN COMPONENTS OR WIRING DURING OVEN OPERATION.
ATTACH METER LEADS WITH
ALLIGATOR CLIPS WHEN MAKING OPERATIONAL TESTS.
Before replacing the blown oven fuse, test the
upper and lower door interlock switches, cook
relay or latch relay, and interlock monitor switch
(middle switch) for proper operation as described in the component test procedures.
DO NOT ATTEMPT TO REPAIR STICKING
CONTACTS OF ANY INTERLOCK SWITCH,
SAFETY SWITCH, OR COOK (LATCH) RELAY (REPLACE SWITCHES).
CAUTION: IT IS NEITHER NECESSARY NOR ADVISABLE TO
ATTEMPT MEASUREMENT OF
HIGH VOLTAGES.
Any indication of sticking contacts during component test requires replacement of that component to assure reliability of the safety interlock system.
CAUTION: BEFORE TOUCHING
ANY OVEN COMPONENTS OR
WIRING, ALWAYS UNPLUG THE
OVEN FROM ITS POWER
SOURCE AND DISCHARGE THE
CAPACITOR BY USING A
20,000-OHM DISCHARGE RESISTOR.
IF THE FUSE IS BLOWN, THE MONITOR,
PRIMARY INTERLOCK AND SECONDARY
INTERLOCK SWITCHES MUST ALSO BE
REPLACED. BE SURE THEY ARE PROPERLY CONNECTED.
NOTES:
OR
• For proper repair and assembly of the oven
door, refer to pages 2-4 and 2-5.
USE AN INSULATED PLASTICHANDLE SCREWDRIVER AND
SHORT ACROSS THE CAPACITOR TERMINALS.
• Interlock switches are not adjustable individually.
• For proper repair and adjustment of the
interlock switches, refer to page 2-8.
vii
R.F. LEAKAGE TEST
When checking for R.F. Ieakage, use an approved R.F. measuring device to assure less
than 4 mw/cm 2 emission at 5 cm distance with
a maximum scan rate of 2.5 cm/second, in
compliance with U.S. Government Department
of Health, Education and Welfare 21 CFR1030,
performance Standard for Microwave Ovens.
CAUTION
EQUIPMENT
• Electromagnetic energy leakage monitor
(NARDA 8100B, HOLADAY H1501).
• 600 ml glass beaker.
A properly operating door and seal assembly
will normally register small emissions, but they
must be no greater than 4 mw/cm 2 to allow for
measurement uncertainty.
• Glass thermometer 100°C or 212°F.
TEST
On every service call, checks for microwave
energy emission must be made according to
the following manner.
1.
Remove the cooking rack from the oven
cavity, if the microwave oven is so
equipped.
2.
Place a 250 ML (8.0 oz.) glass of water in
the center of the oven bottom.
3.
Select “HIGH” cook power, turn the microwave oven on, and test for R.F. Ieakage
at the following locations using the pattern shown below:
a)
b)
c)
d)
e)
f)
g)
h)
i)
j)
k)
I)
4.
NOTE: Enter leakage readings in space BEFORE and AFTER on the service document.
All microwave ovens exceeding the emission
level of 4 mw/cm 2 must be reported to Dept. of
Service for microwave ovens immediately and
the owner should be told not to use the microwave oven until it has been repaired completely.
If a microwave oven is found to operate with
the door open, report to Dept. of Service, the
manufacturer and CDRH* immediately. Also
tell the owner not to use the oven.
Around the cabinet at the front.
Around the door.
Across the console panel.
Horizontally across the door.
Vertically across the door.
Diagonally across the door.
Across the air vents.
Across the rear air vent.
All lockseams.
Weld at bottom.
Bottom plate.
Oven feet.
* CDRH: Center for Device and Radiological Health, Food
and Drug Administration.
The interlock monitor switch acts as the final
safety switch protecting the customer from
microwave radiation. If the interlock monitor
switch operated to blow the fuse when the
interlocks failed you must replace all interlock
switches—primary and secondary interlock
switches and the monitor switch with new
ones because the contacts of those interlock
switches may be melted and welded together.
All repairs must be performed in such a manner that microwave energy emissions are minimal.
The scan speed is one inch per second.
Address for CDRH is:
Office of Compliance (HFZ-312) Center for
Devices and Radiological Health
1390 Piccard Drive
Rockville, Maryland 20850
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Cooking Products Service Manual
Original March 1997
4322167
© 1997 Whirlpool Corporation
Page 1-1
THEORY OF OPERATION
Relay 4 controls the speed of the blower motor
through the contol panel. The base thermal
fuse will also turn the blower motor on to its
low speed if the temperature reaches 133˚F.
The schematic configuration for relay 4 is
shown in the following diagram. The relay is
explained in further detail on the following
page.
The microwave oven is powered by the 120volt line. Whenever the door is closed and a
cooking function is programmed through the
control panel’s keypad, relay contacts on the
control board close, and complete a circuit
from the L1 side to the neutral side of the line.
The control board uses five relays to operate
the various functions of the microwave oven
(see below). The relays are controlled by the
microcomputer on the control board, and perform the functions shown below.
L1
(C)
RELAY 4
(NC)
BLOWER
MOTOR
(NO)
BASE
THERMAL
FUSE
1 ........................................................ Oven Light/Fan & Stirrer Motors
2 ........................................................ High Voltage Section
3 ........................................................ Low-Speed Blower Motor
4 (N.C. Contacts) ........................... Auto Low-Speed Blower Motor
4 (N.O. Contacts) ........................... High-Speed Blower Motor
5 ........................................................ Turntable Motor
MICROCOMPUTER
CN3
Relay
Relay
Relay
Relay
Relay
Relay
CONTROL
CIRCUIT
BOARD
RELAY RY2
RELAY RY4
RELAY RY3
RELAY RY1
RELAY RY5
1-1
(HI)
(LOW)
(C)
The normally-closed (N.C.) contacts of relay 4 provide a potential circuit for the Base Thermal
Fuse. If the base of the oven exceeds 133˚F, the thermal fuse contacts close, and a circuit for
the low-speed side of the blower motor is completed, which turns the motor on. The low-speed
blower will operate until the base temperature drops below 104˚F and opens the thermal fuse
contacts, and turns off.
N
L1
MICROCOMPUTER
BOARD
20A LINE
FUSE
BK
RD
BK
BK
MAGNETRON
THERMAL
FUSE
LOW-VOLTAGE
TRANSFORMER
3
W
1
CAPACITOR
RD
RD
CAVITY
THERMAL
FUSE
RELAY 4
11
BL
W
YL
(HIGH)
(C)
BLOWER
MOTOR
BASE
THERMAL
FUSE
When the low-speed fan is selected by the user at the control panel, relay 3 and the normallyclosed (N.C.) contacts of relay 4, complete the circuit to the low-speed windings of the blower
motor and turn it on.
N
L1
MICROCOMPUTER
BOARD
20A LINE
FUSE
BK
RD
RD
BK
MAGNETRON
THERMAL
FUSE
3
CAVITY
THERMAL
USE
LOW-VOLTAGE
TRANSFORMER
W
1
RELAY 4
CAPACITOR
RD
RD
RELAY 3
9
BL
PK/W
(LOW)
(C)
BLOWER MOTOR
When the high-speed fan is selected by the user at the control panel, the normally-open (N.O.)
contacts of relay 4 complete the circuit to the high-speed windings of the blower motor and turn
it on.
N
L1
MICROCOMPUTER
BOARD
20A LINE
FUSE
BK
RD
MAGNETRON
THERMAL
FUSE
RD
BK
CAVITY
THERMAL
FUSE
3
LOW-VOLTAGE
TRANSFORMER
W
1
CAPACITOR
RD
RD
RELAY 4
13
BL
BK
(HI)
(C)
BLOWER MOTOR
1-2
Cooking Products Service Manual
Original March, 1997
4322167
© 1997 Whirlpool Corporation
Page 2-1
COMPONENT ACCESS
COMPONENT SECTIONS
This section instructs you on how to service
the individual components in the Microwave
Oven Hood Combination. These components
(shown below) and their sections are as follows:
• The Operating Control System
Oven Light Socket
Control Circuit Board
Turntable Indicator Circuit Board
Fan Motor
Power Cord
Blower Motor Capacitor
Convection Heating Element
Gas Sensor
Stirrer Motor
Turntable Motor
Cooktop Light Socket
• General
Cabinet
• The Protection Control System
Oven Door
Oven Door Components
Control Panel
Line Fuse
Interlock Switches
Base Thermal Fuse
Magnetron Thermal Fuse
Convection Thermistor
Cavity Thermal Fuse
• The High Voltage Components
Magnetron
Rectifier
Capacitor
Transformer
Refer to the section on the following pages for
the component you wish to service.
GAS SENSOR (NOT ON ALL MODELS)
BLOWER MOTOR CAPACITOR
CAVITY THERMAL FUSE
CONVECTION HEATING ELEMENT
(NOT ON ALL MODELS)
BLOWER MOTOR
STIRRER MOTOR
CONVECTION THERMISTOR
(NOT ON ALL MODELS)
OVEN LIGHT
MAGNETRON
THERMAL FUSE
FAN MOTOR
MAGNETRON
TURNTABLE MOTOR
HV CAPACITOR
HV RECTIFIER
COOKTOP LIGHTS
SECONDARY INTERLOCK SWITCH
INTERLOCK MONITOR SWITCH
HV TRANSFORMER
PRIMARY INTERLOCK SWITCH
CONTROL CIRCUIT BOARD
BASE THERMAL FUSE
TURNTABLE INDICATOR CIRCUIT BOARD
LINE FUSE
Base Thermal Fuse ................................................. Closes @ 133˚F/56˚C, resets @ 104˚F/40˚C.
Magnetron Thermal Fuse ...................................... Opens @ 228˚F/109˚C, resets @ 140˚F/60˚C.
Cavity Thermal Fuse .............................................. Opens @ 230˚F/110˚C, resets @ 140˚F/60˚C.
2-1
GENERAL
REMOVING THE MICROWAVE OVEN & CABINET
WARNING
4.
Support the front of the microwave oven
and remove the two bolts and washers
from the top of the oven.
5.
Using two people, remove the microwave
oven from its mounting location and set it
on a protected (padded) work surface.
6.
To remove the vent grille from the microwave oven, remove the two inside screws
from the top of the cabinet, then pull the
top of the vent grille out so the two center
tabs are free of their slots, and remove
the grille.
7.
Remove the screw from the power cord
cover and remove the cover.
8.
Remove the remaining screws from the
top and rear of the cabinet.
9.
Slide the cabinet back and unhook the
sides from the tabs, then slide the power
cord out of the cabinet, and remove the
cabinet.
Personal Injury Hazard
Disconnect from the electrical supply before servicing the unit. Failure to do so
could result in death or electrical shock.
IMPORTANT NOTE: Most of the microwave
components can be serviced without removing the unit or its cabinet. They can be accessed by removing the vent grille and the
control panel. Before removing the unit or its
cabinet, first check the procedure for the component you wish to service to see if it is necessary. If it is necessary to remove the unit and
its cabinet to service a component, use the
following procedure.
CAUTION: Because of the weight and size of
the microwave oven, two people are required
to safely move and install it. Failure to do so
could result in personal injury.
1.
Disconnect the electrical supply to the
microwave oven.
2.
Remove the six screws from the base
plate and lower it, (see the illustration on
the next page), then disconnect the
cooktop light connector, and set the base
plate aside.
3.
Remove the lock pin and washer from the
top of the microwave oven.
LOCK PIN &
WASHER
Proceed to the section for the component you
wish to service.
2-2
Cooking Products Service Manual
Original March, 1997
4322167
© 1997 Whirlpool Corporation
CABINET
SCREW
VENT
GRILLE
SCREWS (2)
Page 2-3
POWER
CORD
VENT
GRILLE
CABINET
TAB SLOTS
POWER
CORD COVER
CABINET
SCREWS
SLOTS
BASE
PLATE
BASE PLATE
SCREWS
(6)
CONNECTORS
COOKTOP LIGHT
ASSEMBLY WIRING
Removing The Cabinet
2-3
THE PROTECTION CONTROL SYSTEM
REMOVING THE OVEN DOOR
2.
Remove the two screws from the top of
the cabinet for the vent grille and remove
the grille (see the illustration on page 2-3).
Personal Injury Hazard
3.
Disconnect from the electrical supply before servicing the unit. Failure to do so
could result in death or electrical shock.
Open the oven door all the way, then lift
the door pins out of the hinge holes and
remove it.
4.
Install the new oven door and the vent
grille on the microwave oven.
WARNING
1.
Disconnect the electrical supply to the
microwave oven.
LIFT DOOR PINS
OUT OF HINGE HOLES
PINS
HINGES
2-4
Cooking Products Service Manual
Original March, 1997
4322167
© 1997 Whirlpool Corporation
Page 2-5
REMOVING THE OVEN DOOR COMPONENTS
4.
WARNING
Personal Injury Hazard
To remove the oven door choke, use a
putty knife along the edges, and pry the
choke out from around the inside window
frame.
Disconnect from the electrical supply before servicing the unit. Failure to do so
could result in death or electrical shock.
1.
Disconnect the electrical supply to the
microwave oven.
2.
Remove the two screws from the top of
the cabinet for the vent grille and remove
the grille (see the illustration on page 2-3).
3.
OVEN DOOR
PRY OUT CHOKE
Open the oven door all the way, then lift
the door pins out of the hinge holes and
remove it (see the illustration on the previous page).
5.
To replace the latches and door glass
assembly, remove the two mounting
screws from the end of the glass frame,
then push the top and bottom edges of the
door out and unsnap the locking tabs from
the frame and remove the assembly.
6.
Slide the latches down and remove the
hooked tabs from the slots in the door
frame, then unhook the ends of the spring
from the door, and remove the latches.
7.
Reassemble the oven door.
8.
Reinstall the oven door and vent grille on
the microwave oven.
SLOT
HOOKED TAB
HOOK SPRING
OVER TABS
GLASS
FRAME
LATCHES
TOP LOCKING TABS
GLASS
FRAME
FRAME SCREWS
BOTTOM LOCKING TABS
2-5
REMOVING THE CONTROL PANEL
WARNING
2.
Remove the two screws from the top of
the cabinet for the vent grille and remove
the grille (see the illustration on page
2-3).
3.
Remove the screw from the top center tab
of the control panel, then lift the panel so
that the bottom tabs are out of the slots
and pull it forward.
4.
Turn the panel over and disconnect the
three harness connectors from the board,
then set the control panel aside.
Personal Injury Hazard
Disconnect from the electrical supply before servicing the unit. Failure to do so
could result in death or electrical shock.
1.
Disconnect the electrical supply to the
microwave oven.
CONTROL
PANEL SCREW
TURN PANEL OVER
CONTROL PANEL
BOTTOM
SLOTS
BOTTOM
TABS
2-6
Cooking Products Service Manual
Original March, 1997
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© 1997 Whirlpool Corporation
Page 2-7
REMOVING THE LINE FUSE
WARNING
2.
Remove the two screws from the top of
the cabinet for the vent grille and remove
the grille (see the illustration on page
2-3).
3.
Remove the control panel from the microwave oven (see page 2-6).
4.
From inside the control panel opening,
unsnap and open the fuseholder halves.
5.
Remove the line fuse from the fuseholder
and pull the wire connectors off the ends.
6.
Install the new line fuse and reassemble
the microwave oven.
Personal Injury Hazard
Disconnect from the electrical supply before servicing the unit. Failure to do so
could result in death or electrical shock.
1.
Disconnect the electrical supply to the
microwave oven.
CONTROL PANEL
OPENING
SLIDE WIRE CONNECTORS
OFF ENDS OF FUSE
LINE FUSE
OPEN FUSEHOLDER
SECTIONS
FUSE HOLDER
2-7
REMOVING/ADJUSTING THE INTERLOCK SWITCHES
WARNING
6.
One at a time, pull the wire connectors off
the defective switch, and reconnect them
to the same terminals on the replacement
switch.
7.
Snap the new switch into place on the
switch housing.
8.
Mount the interlock switch assembly to
the chassis flange with two screws.
9.
Close the housing cover and secure it
with its mounting screw.
Personal Injury Hazard
Disconnect from the electrical supply before servicing the unit. Failure to do so
could result in death or electrical shock.
REMOVING A SWITCH
1.
Disconnect the electrical supply to the
microwave oven.
2.
Remove the two screws from the top of
the cabinet for the vent grille and remove
the grille (see the illustration on page
2-3).
3.
Remove the control panel from the microwave oven (see page 2-6).
4.
Remove the two mounting screws from
the interlock switch assembly, and position the assembly so you can easily access the switches and wiring.
5.
Refer to inset 1 on the next page for the
secondary interlock switch, or inset 2 for
any of the other switches mounted on the
2. Reassemble the microwave oven.
interlock switch housing assembly, and
remove the switch from the housing as
shown.
CONTROL PANEL
OPENING
MAKING ADJUSTMENTS
1.
Plug in the microwave oven and check the
operation of the switches. If necessary,
loosen the two housing screws, and adjust the housing so that the switches operate properly. NOTE: The Interlock Monitor
Switch provides an added safety check on
the Primary and Secondary Interlock
Switches. If the Primary and Secondary
Interlock Switches allow the oven to operate with the door open, the Interlock Monitor Switch will blow the line fuse. Unplug
the oven again when you have completed
the checks.
INTERLOCK
SCREW
INTERLOCK
SWITCH
HOUSING
INTERLOCK
SCREW
2-8
Cooking Products Service Manual
Original March, 1997
4322167
© 1997 Whirlpool Corporation
Page 2-9
INSET 2
1. PUSH THIS LOCKING
ARM BACK TO UNLOCK
SWITCH.
INSET 1
1. RAISE THIS LOCKING
ARM TO RELEASE
SWITCH FROM HOUSING.
SECONDARY
INTERLOCK
SWITCH
ALL OTHER
SWITCHES
2. PRESS BODY IN
THIS DIRECTION TO
REMOVE SWITCH
FROM HOUSING.
2. ROTATE SWITCH ON THIS
PIN AND REMOVE
SWITCH FROM HOUSING.
NOTE: THESE POSTS
HOLD THE SWITCH IN
PLACE ON THE HOUSING
AND ARE STATIONARY.
INTERLOCK SWITCH
HOUSING ASSEMBLY
SECONDARY INTERLOCK
SWITCH
WHITE (H.V. Transformer)
SMALL WHITE (Monitor Switch)
LARGE WHITE (Power Cord)
SMALL WHITE (Oven Lamp)
INTERLOCK MONITOR
SWITCH
WHITE (Turntable Motor)
WHITE (Secondary Switch)
RED (H.V. Transformer)
PRIMARY INTERLOCK
SWITCH
PINK (CN2 Pin 1)
Blue (CN2 Pin 3)
Interlock Switch Wiring
2-9
REMOVING THE BASE THERMAL FUSE
WARNING
2.
Remove the two screws from the top of
the cabinet for the vent grille and remove
the grille (see the illustration on page
2-3).
3.
Remove the control panel from the microwave oven (see page 2-6).
4.
Remove the mounting screws from the
base thermal fuse and remove it.
5.
Unplug the connectors from the terminals
of the base thermal fuse.
6.
Install the new base thermal fuse and
reassemble the microwave oven.
Personal Injury Hazard
Disconnect from the electrical supply before servicing the unit. Failure to do so
could result in death or electrical shock.
1.
Disconnect the electrical supply to the
microwave oven.
CONTROL PANEL
OPENING
PINK
WHITE
BASE
THERMAL FUSE
THE BASE THERMAL FUSE CLOSES
AT 133˚F & RESETS @ 104˚F.
2-10
YELLOW
Cooking Products Service Manual
Original March, 1997
4322167
© 1997 Whirlpool Corporation
Page 2-11
REMOVING THE MAGNETRON THERMAL FUSE
WARNING
4.
Unplug the line cord connector and remove the line cord.
5.
Unplug the connector from the terminals
of the fan motor.
6.
Remove the five screws from the air duct.
7.
Lift the air duct and position it so that you
can access the magnetron thermal fuse,
then remove the mounting screw, and
unplug the connectors from its terminals.
8.
Install the new magnetron thermal fuse
on the air duct, and reassemble the microwave oven.
Personal Injury Hazard
Disconnect from the electrical supply before servicing the unit. Failure to do so
could result in death or electrical shock.
1.
Disconnect the electrical supply to the
microwave oven.
2.
Remove the microwave oven from its
mounting location (see page 2-2).
3.
Remove the vent grille and cabinet from
the microwave oven (see the illustration
on page 2-3).
REMOVE FIVE
AIR DUCT SCREWS
UNPLUG POWER
CORD & FAN MOTOR
BOTTOM
OF AIR DUCT
MAGNETRON
THERMAL FUSE
THE MAGNETRON THERMAL FUSE
OPENS AT 228˚F & RESETS @ 140˚F.
2-11
BLACK & RED
WIRES
REMOVING THE CONVECTION THERMISTOR
WARNING
5.
Remove the screws from the circulation
pulley cover and the bracket, then remove the cover and the attached brackets from the top of the oven. Do not remove the brackets from the cover.
6.
Remove the screw from the convection
thermistor and remove the thermistor.
7.
Cut the two white wires (not the thermistor wires) coming from the control
board next to the splice.
8.
Splice the white wires onto the ends of the
new convection thermistor wires. Cover
the spliced wire ends with electrical tape
so that they cannot short to the oven.
9.
Mount the new convection thermistor to
the oven and reassemble the microwave
oven.
Personal Injury Hazard
Disconnect from the electrical supply before servicing the unit. Failure to do so
could result in death or electrical shock.
1.
Disconnect the electrical supply to the
microwave oven.
2.
Remove the microwave oven from its
mounting location (see page 2-2).
3.
Remove the vent grille and cabinet from
the microwave oven (see the illustration
on page 2-3).
4.
Remove the five screws from the air duct
and position it so that you can access the
pulley cover underneath.
2-12
Cooking Products Service Manual
Original March, 1997
4322167
© 1997 Whirlpool Corporation
BRACKETS
CIRCULATION
PULLEY COVER
WHITE WIRES
SENSOR
COVER
PHILLIPS
SCREW
CAUTION: WHEN REPLACING THE
THERMISTOR, DO NOT CUT AND SPLICE
THE WHITE WIRES, OR AN IMPROPER
SIGNAL WILL BE SENT FROM THE THERMISTOR
TO THE MICROCOMPUTER BOARD
CONVECTION
THERMISTOR
REMOVE FIVE
AIR DUCT SCREWS
2-13
Page 2-13
REMOVING THE CAVITY THERMAL FUSE
3.
Remove the vent grille and cabinet from
the microwave oven (see the illustration
on page 2-3).
Personal Injury Hazard
4.
Remove the five screws from the air duct.
Disconnect from the electrical supply before servicing the unit. Failure to do so
could result in death or electrical shock.
5.
Unplug the connectors from the terminals
of the cavity thermal fuse, then lift the left
side of the air duct, and remove the cavity
thermal fuse. NOTE: There are no mounting screws holding the cavity thermal fuse
in place.
6.
Install the new cavity thermal fuse in its
mounting hole, and reassemble the microwave oven.
WARNING
1.
Disconnect the electrical supply to the
microwave oven.
2.
Remove the microwave oven from its
mounting location (see page 2-2).
CAVITY
THERMAL
FUSE
THE CAVITY THERMAL
FUSE OPENS AT 230˚F
AND RESETS AT 140˚F
AIR DUCT
REMOVE FIVE
AIR DUCT SCREWS
2-14
Cooking Products Service Manual
Original March, 1997
4322167
© 1997 Whirlpool Corporation
Page 2-15
THE OPERATING CONTROL SYSTEM
REMOVING THE OVEN LIGHT SOCKET
WARNING
4.
Remove the mounting screw from the light
cover and remove the cover.
5.
Remove the bulb from the oven light
socket.
6.
Cut the wires near the old light socket
body.
7.
Push the locking tab and turn the socket
and remove it from the bracket.
8.
Remove 1/ 2" of insulation from the cut wire
ends of the black and white wires and
then splice them to the wires of the new
socket with two wire nuts.
9.
Install the new light socket and its bulb,
and reassemble the microwave oven.
Personal Injury Hazard
Disconnect from the electrical supply before servicing the unit. Failure to do so
could result in death or electrical shock.
1.
Disconnect the electrical supply to the
microwave oven.
2.
Remove the microwave oven from its
mounting location (see page 2-2).
3.
Remove the vent grille and cabinet from
the microwave oven (see the illustration
on page 2-3).
CUT
&
SPLICE
BRACKET
SOCKET
(TWIST TO
REMOVE)
BULB
MOUNTING
POST
& SCREW
LOCKING TAB
AIRDUCT
2-15
REMOVING THE CONTROL CIRCUIT BOARD
& THE TURNTABLE INDICATOR CIRCUIT BOARD
WARNING
3.
Remove the screw from the top center tab
of the control panel, then lift the panel so
that the bottom tabs are out of the slots
and turn it over.
4.
To remove the control circuit board,
disconnect the three harness connectors
and the ribbon cable (see the inset), and
remove the three mounting screws.
5.
To remove the turntable indicator circuit board, unplug the connector at CN5,
and unsnap it from the locking arms.
6.
Install the new circuit board in its mounting location and reassemble the microwave oven.
Personal Injury Hazard
Disconnect from the electrical supply before servicing the unit. Failure to do so
could result in death or electrical shock.
1.
Disconnect the electrical supply to the
microwave oven.
2.
Remove the two screws from the top of
the cabinet for the vent grille and remove
the grille (see the illustration on page
2-3).
CONTROL
PANEL SCREW
TURN PANEL OVER
CONTROL BOARD
MOUNTING
SCREWS
DISCONNECT
THREE HARNESS
CONNECTORS
CN5
RIBBON CABLE
LOCKING ARMS
COLLAR
UNSNAP/SNAP LOCKING
ARMS ON COLLAR TO
BOTTOM SIDE OF
CONNECTOR
TURNTABLE
INDICATOR
BOARD
BOTTOM
TABS
CN3
BOTTOM
SLOTS
INSERT CABLE INTO
REAR CONTACT SLOT
2-16
CONNECTOR
INSET
Cooking Products Service Manual
Original March, 1997
4322167
© 1997 Whirlpool Corporation
Page 2-17
REMOVING THE FAN MOTOR
WARNING
4.
Pull the fan blade and press-on washer
off the fan motor shaft.
5.
Unplug the connector from the fan motor
terminals.
6.
Remove the two mounting screws from
the fan motor and remove the motor from
the air duct.
7.
Install the new fan motor in its mounting
location and reassemble the microwave
oven.
Personal Injury Hazard
Disconnect from the electrical supply before servicing the unit. Failure to do so
could result in death or electrical shock.
1.
Disconnect the electrical supply to the
microwave oven.
2.
Remove the microwave oven from its
mounting location (see page 2-2).
3.
Remove the vent grille and cabinet from
the microwave oven (see the illustration
on page 2-3).
MOUNTING
SCREW
FAN MOTOR
CONNECTOR
AIR DUCT
FAN BLADE
PRESS-ON WASHER
2-17
REMOVING THE POWER CORD
3.
Remove the vent grille and cabinet from
the microwave oven (see the illustration
on page 2-3).
Personal Injury Hazard
4.
Disconnect from the electrical supply before servicing the unit. Failure to do so
could result in death or electrical shock.
Unplug the connector on the old power
cord from the air duct connector and install the new power cord.
5.
Reassemble the microwave oven.
WARNING
1.
Disconnect the electrical supply to the
microwave oven.
2.
Remove the microwave oven from its
mounting location (see page 2-2).
POWER CORD
CONNECTOR
LOCKING
ARM
POWER CORD
AIR DUCT
CONNECTOR
2-18
Cooking Products Service Manual
Original March, 1997
4322167
© 1997 Whirlpool Corporation
Page 2-19
REMOVING THE BLOWER MOTOR CAPACITOR
WARNING
2.
Remove the microwave oven from its
mounting location (see page 2-2).
3.
Remove the vent grille and cabinet from
the microwave oven (see the illustration
on page 2-3).
4.
Remove the five screws from the air duct.
5.
Cut the wires near the body of the blower
motor capacitor.
6.
Remove 1/ 2" of insulation from the cut wire
ends of the red harness wires and then
splice them to the wires of the new capacitor with two wire nuts.
7.
Install the new blower motor capacitor to
the air duct and reassemble the microwave oven.
Personal Injury Hazard
Disconnect from the electrical supply before servicing the unit. Failure to do so
could result in death or electrical shock.
1.
Disconnect the electrical supply to the
microwave oven.
WIRE NUT
CUT &
SPLICE
WIRES
AIR DUCT
BLOWER MOTOR
CAPACITOR
MOUNTING SCREW
REMOVE FIVE
AIR DUCT SCREWS
2-19
REMOVING THE CONVECTION HEATING ELEMENT
WARNING
6.
Remove the screw from the gas sensor
and position the sensor out of the way.
7.
Unhook the drive belt from the circulation
fan pulleys and set it aside.
8.
Remove the phillips screw from the convection thermistor that is located on the
top plate. Remove the thermistor and
position it out of the way.
9.
Disconnect the wires from the convection
heating element terminals.
Personal Injury Hazard
Disconnect from the electrical supply before servicing the unit. Failure to do so
could result in death or electrical shock.
1.
2.
3.
4.
5.
Disconnect the electrical supply to the
microwave oven.
Remove the microwave oven from its
mounting location (see page 2-2).
Remove the vent grille and cabinet from
the microwave oven (see the illustration
on page 2-3).
Remove the five screws from the air duct,
then lift the duct and postion it so you can
access the convection heating element.
Remove the three phillips screws from
the circulation pulley cover and the one
from the bracket, and remove the cover
and attached brackets from the top of the
oven. Do not remove the brackets from
the cover.
10. Remove the phillips screws from the top
cover, remove it from the oven, and turn it
over.
11. Remove the two phillips screws from the
convection heating element bracket.
Unclip the element from the cover and
remove it.
12. Install the new heating element into the
mounting clips in the top cover, and secure the mounting bracket with two phillips
screws.
13. Reassemble the microwave oven.
2-20
Cooking Products Service Manual
Original March, 1997
4322167
© 1997 Whirlpool Corporation
UNCLIP
ELEMENT
HERE
HEATING ELEMENT
MOUNTING SCREWS
HEATING ELEMENT
VIEWED FROM UNDER
TOP PLATE
BRACKETS
CIRCULATION
PULLEY COVER
TOP PLATE
MOUNTING SCREWS
CONVECTION
THERMISTOR
GAS SENSOR
TOP PLATE
SENSOR
COVER
CONVECTION
HEATING
ELEMENT
REMOVE FIVE
AIR DUCT SCREWS
2-21
YELLOW
WIRES
Page 2-21
REMOVING THE GAS SENSOR
WARNING
2.
Remove the microwave oven from its
mounting location (see page 2-2).
3.
Remove the vent grille and cabinet from
the microwave oven (see the illustration
on page 2-3).
4.
Remove the five screws from the air duct,
then lift the duct and postion it so you can
access the gas sensor.
5.
Remove the screw from the gas sensor
board and remove it from the sensor cover,
then unplug the connector from the control board.
6.
Install the new gas sensor board and then
reassemble the microwave oven.
Personal Injury Hazard
Disconnect from the electrical supply before servicing the unit. Failure to do so
could result in death or electrical shock.
1.
Disconnect the electrical supply to the
microwave oven.
SENSOR
COVER
MOUNTING
SCREW
WH
RD
YL
GAS
SENSOR
BOARD
WHT
RED
YEL
REMOVE FIVE
AIR DUCT SCREWS
2-22
Cooking Products Service Manual
Original March, 1997
4322167
© 1997 Whirlpool Corporation
Page 2-23
REMOVING THE STIRRER MOTOR
WARNING
2.
Remove the microwave oven from its
mounting location (see page 2-2).
3.
Remove the vent grille and cabinet from
the microwave oven (see the illustration
on page 2-3).
4.
Remove the five screws from the air duct
and lift the duct just enough to access the
stirrer motor, then unplug the connector
from the stirrer motor terminals.
5.
Remove the two mounting screws from
the stirrer motor, lift the motor straight up
so that the shaft is free of the stirrer
blade, and remove the motor.
6.
Install the new stirrer motor so the motor
shaft fits into the hole of the rectangular
pivot on the stirrer blade, and secure the
motor to its mounting location.
7.
To access the stirrer blade, unsnap the
two fasteners from the top cover inside
the oven cavity, and lower the cover and
the stirrer blade. NOTE: When you reassemble the cover and stirrer blade, make
sure that you position the blade with the
“TOP” marking facing up.
8.
Reassemble the microwave oven.
Personal Injury Hazard
Disconnect from the electrical supply before servicing the unit. Failure to do so
could result in death or electrical shock.
1.
Disconnect the electrical supply to the
microwave oven.
MOUNTING
SCREWS
CONNECTOR
STIRRER MOTOR
STIRRER
BLADE
TOP
TOP
COVER
FASTENERS
REMOVE FIVE
AIR DUCT SCREWS
2-23
REMOVING THE TURNTABLE MOTOR
WARNING
3.
Remove the base plate from the microwave oven and unplug the cooktop light
connector (see the illustration on page
2-3).
4.
Unplug the connector and remove the two
mounting screws from the turntable motor, then remove the motor from the bottom of the microwave oven.
5.
Mount the new turntable motor and reassemble the microwave oven.
Personal Injury Hazard
Disconnect from the electrical supply before servicing the unit. Failure to do so
could result in death or electrical shock.
1.
Disconnect the electrical supply to the
microwave oven.
2.
From inside the oven cavity, lift the turntable rest off the shaft of the turntable
motor
TURNTABLE REST
BOTTOM OF
OVEN
CONNECTOR
TURNTABLE
MOTOR
2-24
Cooking Products Service Manual
Original March, 1997
4322167
© 1997 Whirlpool Corporation
Page 2-25
REMOVING THE COOKTOP LIGHT SOCKETS
WARNING
Personal Injury Hazard
3.
Remove the bulbs from the sockets and
unplug the socket wire connector from
the microwave oven.
4.
To remove the sockets, press the locking
tabs near the base of each socket, and
twist the socket until the tabs align with
the slots in the bracket, then remove the
sockets from the bracket.
5.
Mount the new sockets to the bracket,
reinstall the bulbs, and reassemble the
microwave oven.
Disconnect from the electrical supply before servicing the unit. Failure to do so
could result in death or electrical shock.
1.
Disconnect the electrical supply to the
microwave oven.
2.
Remove the base plate from the microwave oven and unplug the cooktop light
connector (see the illustration on page
2-3).
BASE
PLATE
CONNECTOR
TWIST SOCKET
TO REMOVE
COOKTOP LIGHTS
2-25
THE HIGH VOLTAGE COMPONENTS
ACCESSING THE COMPONENTS
The components for service in this section
include the:
WARNING
Magnetron
High Voltage Rectifier
High Voltage Capacitor
High Voltage Transformer
Personal Injury Hazard
Disconnect from the electrical supply before servicing the unit. Failure to do so
could result in death or electrical shock.
The locations of the high voltage components
are shown below. All of the high voltage components are accessible through the front control panel cutout. However, the cabinet must
be removed to access the mounting screws for
the magnetron. Refer to the following pages
for servicing the high voltage components.
Discharge the high voltage capacitor before working inside the oven. Failure to do
so could result in death or electrical shock.
MAGNETRON
HIGH VOLTAGE
RECTIFIER
HIGH VOLTAGE
TRANSFORMER
HIGH VOLTAGE
CAPACITOR
2-26
Cooking Products Service Manual
Original March, 1997
4322167
© 1997 Whirlpool Corporation
Page 2-27
REMOVING THE MAGNETRON
WARNING
2.
Discharge the high-voltage capacitor.
3.
Remove the microwave oven from its
mounting location, then remove the vent
grille and the cabinet from the oven (see
pages 2-2 and 2-3).
4.
Remove the control panel from the microwave oven (see page 2-6).
5.
From inside the control panel opening,
support the magnetron with one hand,
then remove the four mounting screws
from the magnetron through the four access holes in the top of the air duct.
6.
Unplug the wire connector from the back
of the magnetron and remove the magnetron from the oven.
7.
Install the new magnetron and reassemble
the microwave oven.
Personal Injury Hazard
Disconnect from the electrical supply before servicing the unit. Failure to do so
could result in death or electrical shock.
1.
Disconnect the electrical supply to the
microwave oven.
WARNING
Personal Injury Hazard
Disconnect from power supply before servicing. Discharge the capacitor using a
20,000-ohm discharge resistor, or an insulated plastic-handle screwdriver to short
across the capacitor terminals.
MAGNETRON
MOUNTING
SCREWS
CONNECTOR
MAGNETRON
2-27
REMOVING THE HIGH VOLTAGE RECTIFIER
AND THE HIGH VOLTAGE CAPACITOR
WARNING
2.
Discharge the high-voltage capacitor.
3.
Remove the two screws from the top of
the cabinet for the vent grille and remove
the grille (see the illustration on page
2-3).
4.
Remove the control panel from the microwave oven (see page 2-6).
5.
From inside the control panel opening,
remove the screw from the capacitor
bracket, and remove the bracket and capacitor so that you can access the capacitor terminals.
6.
Unplug the wire connectors and the high
voltage rectifier from the capacitor terminals and remove the capacitor and rectifier from the oven.
7.
Install the high voltage rectifier and capacitor and reassemble the microwave
oven.
Personal Injury Hazard
Disconnect from the electrical supply before servicing the unit. Failure to do so
could result in death or electrical shock.
1.
Disconnect the electrical supply to the
microwave oven.
WARNING
Personal Injury Hazard
Disconnect from power supply before servicing. Discharge the capacitor using a
20,000-ohm discharge resistor, or an insulated plastic-handle screwdriver to short
across the capacitor terminals.
HV RECTIFIER
STRAP
ORG TO
MAGNETRON
RED TO HV
TRANSFORMER
MOUNTING
SCREW
HV RECTIFIER
2-28
Cooking Products Service Manual
Original March, 1997
4322167
© 1997 Whirlpool Corporation
Page 2-29
REMOVING THE HIGH VOLTAGE TRANSFORMER
WARNING
WARNING
Personal Injury Hazard
Personal Injury Hazard
Disconnect from the electrical supply before servicing the unit. Failure to do so
could result in death or electrical shock.
Disconnect from power supply before servicing. Discharge the capacitor using a
20,000-ohm discharge resistor, or an insulated plastic-handle screwdriver to short
across the capacitor terminals.
1.
Disconnect the electrical supply to the
microwave oven.
2.
Discharge the high-voltage capacitor.
3.
Remove the two screws from the top of
the cabinet for the vent grille and remove
the grille (see the illustration on page
2-3).
4.
Remove the control panel from the microwave oven (see page 2-6).
5.
Disconnect the filament wires from the
magnetron, then disconnect the three remaining wires from the terminals at the
front and back of the high voltage transformer.
6.
Remove the three hex nuts from the high
voltage transformer and remove the transformer from the oven.
7.
Install the new high voltage transformer
and reassemble the microwave oven.
FILAMENT TO
MAGNETRON
ORG TO
HV CAP
HV TRANSFORMER
RED & WHITE
PRIMARY WIRES
HEX NUTS
2-29
— NOTES —
2-30
Cooking Products Service Manual
Original March, 1997
4322167
© 1997 Whirlpool Corporation
Page 3-1
COMPONENT DESCRIPTION & TESTING
IMPORTANT SAFETY INSTRUCTIONS
CAUTION
Warning To Service Technicians!
To avoid possible exposure to microwave radiation or energy, visually check the oven for damage to the
door and door seal before operating any oven. Use a microwave survey meter to check the amount of
leakage before servicing. In the event the R.F. Ieakage exceeds 4 mW/cm at 5 cm, appropriate repair must
be made before continuing to service the unit. Check interlock function by operating the door latch. The
oven cook cycle should cut off before the door can be opened.
The door and latching assembly contains the radio frequency energy within the oven. The door is protected
by three safety interlock switches. Do not attempt to defeat them.
UNDER NO CIRCUMSTANCES SHOULD YOU TRY TO OPERATE THE OVEN WITH THE DOOR OPEN.
• Proper operation of microwave ovens requires that the magnetron be properly assembled to the
waveguide and cavity. Never operate the magnetron unless it is properly installed.
• Be sure the “RF” seal is not damaged and is assembled around the magnetron dome properly when
installing the magnetron.
• Routine service safety procedures should be exercised at all times.
• Untrained personnel should not attempt service without a thorough review of test procedures and safety
information contained in this manual.
PRECAUTIONS TO BE OBSERVED BEFORE AND
DURING SERVICING TO AVOID POSSIBLE EXPOSURE
TO EXCESSIVE MICROWAVE ENERGY
A.
Do not operate or allow the oven to be operated with the door open.
B.
Make the following safety checks on all ovens to be serviced before activating the magnetron or other
microwave source and make repairs as necessary.
1.
2.
3.
4.
5.
Interlock Operation
Proper Door Closing
Seal and Sealing Surfaces (Arcing, Wear and Other Damage)
Damage to or Loosening of Hinges and Latches
Evidence of Dropping or Abuse
C.
Before turning on the microwave power for any service test or inspection within the microwave
generating components, check the magnetron, wave guide or transmission line and cavity for proper
alignment.
D.
Any defective or misadjusted components in the interlock, monitor, door seal and microwave
generation and transmission system shall be repaired or adjusted by procedures described in the
Basic Service Manuals for the specific microwave oven being serviced before the oven is released
to the owner.
E.
A microwave leakage check to verify compliance with Federal Performance Standards should be
performed on each oven prior to release to the owner.
F.
Do not attempt to operate the oven if the door glass is broken.
3-1
Whirlpool microwave ovens have a monitoring system designed to assure proper operation of the safety
interlock systems.
The interlock monitor switch will immediately cause the oven fuse to blow if the door is opened and the
primary door interlock switch and/or the secondary interlock switch contacts fail in a closed position.
CAUTION: REPLACE BLOWN FUSE WITH 15 AMPERE CLASS H FUSE ONLY.
Test the upper and lower door interlock switches, cook relay and interlock monitor switch (middle switch)
for proper operation as described in the component test procedures, before replacing the blown oven fuse.
DO NOT ATTEMPT TO REPAIR STICKING CONTACTS OF ANY INTERLOCK SWITCH, SAFETY
SWITCH OR COOK (LATCH) RELAY. REPLACE THE SWITCHES AND RELAY.
Any indication of sticking contacts during component tests requires replacement of that component to
assure reliability of the safety interlock system.
IF THE FUSE IS BLOWN, THE MONITOR, PRIMARY AND SECONDARY INTERLOCK SWITCHES MUST
BE REPLACED. BE SURE THEY ARE PROPERLY CONNECTED.
Precautions to Avoid Possible Exposure
to Excessive Microwave Energy
DO NOT attempt to operate the oven with the door open since open-door operation can result
in harmful exposure to microwave energy. It is important not to defeat or tamper with the safety
interlocks.
DO NOT place any object between the oven front face and the door or allow soil or cleaner
residue to accumulate on sealing surfaces.
DO NOT operate the oven if it is damaged. It is particularly important that the oven door close
properly and that there is no damage to the:
1. Door (bent).
2. Hinges and Latches (broken or loosened).
3. Door Seals and Sealing Surfaces.
DO NOT operate the microwave oven if the door window is broken.
The microwave oven should be checked for microwave leakage by qualified service personnel
after a repair is made.
The oven should not be adjusted or repaired by anyone except properly qualified service
personnel.
DO NOT operate the microwave oven with the outer cabinet removed.
3-2
Cooking Products Service Manual
Original March, 1997
4322167
© 1997 Whirlpool Corporation
CAUTION
Page 3-3
WARNING
• High voltages are present during the cook
cycle. Extreme caution should be observed
at all times.
• Disconnect the oven from electrical supply before servicing. Failure to do so could result in
electrical shock or death.
• Abrasive cleansers, steel-wool pads, gritty
wash cloths, etc. can damage the control panel
and the interior and exterior oven surfaces. Use
a sponge with mild detergent or paper towels
with spray glass cleaner. Apply spray glass
cleaner to paper towel. Do not spray directly
on oven.
• Improper use of the grounding plug can result
in a risk of electrical shock. Do not, under any
circumstance, cut or remove the third ground
prong from the power cord plug.
Fire, Electrical Shock, Excessive
Exposure to Microwave Energy,
Personal Injury & Product
Damage Hazard
• Before touching any oven component or wiring, always unplug the oven from its power
source and discharge the capacitor by using a
20,000 ohm discharge resistor or use an insulated plastic handle screwdriver to short across
the capacitor terminals.
• Do not block the rear air intake openings or
exhaust vents. Allow a few inches of space at
the back of the oven where intake openings
and exhaust vents are located. Blocking the air
intake openings and exhaust vents can cause
damage to the oven and poor cooking results.
Make sure the microwave oven legs are in
place to ensure proper airflow.
• Check that the unit is grounded before troubleshooting. Be careful of the high voltage circuits.
Discharge any static charge from your body by
touching ground before handling any part of the
circuitry on the control board. Electrostatic discharge may damage the control circuit.
• Do not install the oven next to or over a heat
source (a cooktop or range).
• Do not touch oven components or wiring during operation. Attach meter leads with alligator
clips when making operational tests.
• Do not install oven in any area where excessive heat and steam are generated. This could
cause fire, electrical shock, excessive exposure
to microwave energy, other personal injury or
damage to the outside of the cabinet.
• For continued protection against radiation emission, replace only with these types of switches:
Primary (Interlock) Switch: SZM-V16-FA-63 or
VP-533A-OF; Secondary (Interlock) Switch:
SZM-V01-FA-32; Interlock (Monitor) Switch:
SZM-Vl6-FA-62 or VP-532A-OF; Oven Lamp
Switch: SZM-V6-FA-31 or VP-331A-OD.
• It is neither necessary nor advisable to attempt
measurement of high voltage.
• Attaching the adaptor ground terminal to the
wall receptacle cover screw does not ground
the appliance unless the cover screw is metal
and not insulated and the wall receptacle is
grounded through the house wiring.
3-3
THE THERMAL FUSES
There are three thermal fuses in the OTR
Microwave Oven. They are: the magnetron
thermal fuse, the cavity thermal fuse, and the
base thermal fuse. The magnetron and cavity
thermal fuses are located inside the highvoltage section of the oven. These two thermal fuses are normally-closed, and will open
at a set temperature to disable the oven. Both
of these fuses are resettable.
The base thermal fuse is located directly behind the control panel. It is a normally-open
fuse that, when closed, activates the blower
motor at a low speed.
POSSIBLE CUSTOMER COMPLAINT:
The unit turns on by itself.
Magnetron Thermal Fuse
Opens @ 228˚F/109˚C
Resets @ 140˚F/60˚C
Cavity Thermal Fuse
Opens @ 230˚F/110˚C
Resets @ 140˚F/60˚C
Base Thermal Fuse
Closes @ 133˚F/56˚C
Resets @ 104˚F/40˚C
MAGNETRON
THERMAL FUSE
CAVITY
THERMAL
FUSE
BASE
THERMAL FUSE
3-4
Cooking Products Service Manual
Original March, 1997
4322167
© 1997 Whirlpool Corporation
Page 3-5
THE BLOWER MOTOR CAPACITOR
The blower motor capacitor is located below
the air duct at the indicated location. It is in
use any time the blower (vent) motor is oper-
ating. The capacitor helps to maintain a constant voltage to the blower motor so that it
runs more efficiently.
AIR DUCT
BLOWER MOTOR
CAPACITOR
TESTING
1. Set the ohmmeter to the R x 10K scale.
2. Measure across the capacitor terminals.
The ohmmeter should indicate several
ohms, then gradually return to infinity.
3-5
THE GAS SENSOR
depending upon the humidity of the oven.
Changing humidity conditions, due to the cooking process within the oven cavity, causes a
difference in potential between these two circuits. This difference is monitored by the microcomputer during cooking, allowing the microcomputer to determine the proper cook
time.
The gas sensor is used during the “Sensor
Cook” operation of the oven. It is located
above the oven and is mounted on the left side
of the sensor cover. The sensor consists of
two circuits housed on a small microcomputer
board that is supplied with a current to keep it
heated. The sensor heat conductivity will vary,
NOTE: Always verify that the sensor cover is
not obstructed (proper air flow is passing over
the sensor), and that the fan motor is working
properly, before replacing the gas sensor.
TESTING
1. Set the ohmmeter to the R x 1
scale.
2. Remove the 3-pin connector from
the control circuit board and measure the resistance between the:
SENSOR
COVER
MOUNTING
SCREW
a) Red & white wire terminals.
You should measure 20 Ω @
68˚F.
WH
RD
YL
b) White & yellow wire terminals.
You should measure infinity.
GAS
SENSOR
BOARD
WHT
RED
YEL
3-6
Cooking Products Service Manual
Original March, 1997
4322167
© 1997 Whirlpool Corporation
Page 3-7
THE CONVECTION THERMISTOR
thermistor signal going back to the microcomputer causes the heater relay to open and
close, and cycles the heating element on and
off.
The convection thermistor is located under
the circulation pulley cover and is used during
the convection operation of the oven. When
the temperature increases, the resistance of
the thermistor decreases. The thermistor resistance is monitored by the microcomputer.
As the oven temperature rises and falls, the
NOTE: Verify that the heating element is working correctly before replacing a thermistor.
TESTING
1. Set the ohmmeter to the R x 10K
scale.
2. Remove the 6-pin connector from
the control circuit board and measure across terminals 5 & 6.
You should measure 155 kΩ to
350 kΩ @ 68˚F.
BRACKETS
CIRCULATION
PULLEY COVER
SENSOR
COVER
PHILLIPS
SCREW
CONVECTION
THERMISTOR
3-7
THE CONVECTION HEATING ELEMENT
and the heater relay on the microcomputer
board. During a convection, or combination
cooking cycle, the heater cycles on and off to
maintain the programmed cavity temperature.
The heating element surrounds the convection fan blade and is not visible through the
oven cavity.
The 1400-watt convection heating element is
located under the circulation pulley cover and
the top plate. The heating element heats the
air that is distributed into the oven cavity by
the convection fan. It operates on 120 VAC
and is controlled by the convection thermistor,
UNCLIP
ELEMENT
HERE
HEATING ELEMENT
MOUNTING SCREWS
HEATING ELEMENT
VIEWED FROM UNDER
TOP PLATE
BRACKETS
CIRCULATION
PULLEY COVER
CONVECTION
THERMISTOR
TOP PLATE
SENSOR
COVER
CONVECTION
HEATING
ELEMENT
TESTING
1. Set the ohmmeter to the R x 1
scale.
2. Measure across the heating element terminals.
You should measure between
40 Ω and 90 Ω @ 68˚F.
3-8
YELLOW
WIRES
Cooking Products Service Manual
Original March, 1997
4322167
© 1997 Whirlpool Corporation
Page 3-9
MOTORS
Blower Motor —Removes smoke and odors from the kitchen
cooking area through outside venting or recirculation.
Fan Motor —Cools the magnetron and circulates air through the
oven during microwave cooking.
Stirrer and Turntable Motors —Distribute microwave energy
evenly during microwave cooking.
STIRRER MOTOR
BLOWER MOTOR
FAN MOTOR
TURNTABLE
MOTOR
3-9
PROGRAMMING CHECKS
TOUCH PANEL CONTINUITY TEST
1.
Unplug the microwave oven’s power supply cord.
2.
Open the oven door.
3.
Plug the power cord back into the AC
receptical. You should see the following
display if any of the interlock switches are
closed:
If the sensor is defective, or if the wires are not
properly connected, you will see the following
display:
–f1–
–f2–
3-10
Cooking Products Service Manual
Original March, 1997
4322167
© 1997 Whirlpool Corporation
Page 3-11
CHARTS
PROBLEM
POSSIBLE CAUSE
TEST PROCEDURE
OR CORRECTION
Line fuse blows when power
cord is plugged into a wall
receptacle.
Shorted wire in power cord,
wiring harness, or overload
circuit.
1.
Oven will not operate.
1.
No power at wall plug.
1.
2.
Open wire in power cord
or wiring harness.
Control board.
Line fuse.
Thermal fuses.
2.
3.
4.
5.
Check fuse or breaker
box.
Check wiring with ohmmeter for continuity.
Check board.
Check fuse.
Check fuses.
Bulb is burned out.
Lamp socket.
Oven lamp switch.
Open wiring between the
above components.
Control board.
1.
2.
3.
4.
Replace bulb.
Check lamp socket.
Check control board.
Repair open wire.
5.
Check control board.
Control board.
Line fuse and/or thermal
fuses.
Interlock switches.
Open wiring between the
above components.
1.
2.
Check control board.
Check line fuse and/or
thermal fuses.
Check interlock switches.
Repair open wire.
Control board.
Low line voltage (should
be at least 108-volts
AC).
Thermal fuse.
Thermal fuse on magnetron.
Circuit is overloaded.
1.
2.
Check control board.
Use separate 15- to 20ampere circuit.
3.
4.
Check thermal fuse.
Check thermal fuse on
magnetron.
Use separate 15- to 20ampere circuit.
3.
4.
5.
Oven cavity light will not turn
on.
1.
2.
3.
4.
5.
Oven will not go into “Cook”
cycle when the door is closed.
1.
2.
3.
4.
Oven goes into “Cook” cycle,
but does not complete the
cycle. Heat is produced in the
oven load.
1.
2.
3.
4.
5.
3-11
2.
3.
4.
5.
Check wiring with ohmmeter for continuity.
Use separate 15- to 20ampere circuit.
PROBLEM
POSSIBLE CAUSE
TEST PROCEDURE
OR CORRECTION
Little or no heat is produced
in the oven load.
1.
High voltage transformer.
1.
2.
Rectifier diode.
2.
3.
High voltage capacitor.
3.
4.
5.
Magnetron.
Power selector.
4.
5.
1.
Primary interlock switch.
1.
2.
Shorted wire harness.
2.
Oven lamp goes on with the
door open, but the light goes
out when the door is closed
with the control on.
1.
Secondary interlock.
1.
Check secondary interlock.
The power source fuse blows
when the door starts to open.
1.
High voltage transformer.
Secondary circuit of the
high voltage transformer
is shorted.
High voltage capacitor is
shorted.
Shorted wiring between
the above components.
1.
Check the high voltage
transformer.
Check the high voltage
transformer.
Oven fuse blows when the
door is opened.
2.
3.
4.
Fan motor will not operate.
2.
3.
4.
5.
Blower motor.
5.
1.
2.
Fan motor.
Open or loose wiring in
circuit to fan motor.
1.
2.
3-12
Check the high voltage
transformer.
Check the high voltage
rectifier diode.
Check the high voltage
capacitor.
Check the magnetron.
Check the power selector.
Check primary interlock
switch.
Repair wiring.
Check the high voltage
capacitor.
Use an ohmmeter to
check continuity, and
repair wiring.
Check blower motor.
Check fan motor.
Use ohmmeter to check
continuity, and repair
wiring.
Cooking Products Service Manual
Original March, 1997
4322167
© 1997 Whirlpool Corporation
Page 3-13
PROBLEM
POSSIBLE CAUSE
TEST PROCEDURE
OR CORRECTION
Blower motor will not operate.
1.
2.
3.
Blower motor.
Control board.
Open or loose wiring in
circuit to blower motor.
1.
2.
3.
Check blower motor.
Check control board.
Use ohmmeter to check
continuity, and repair
wiring.
Cooktop lamps do not come
on.
1.
2.
3.
4.
Bulb burned out.
Control board.
Lamp sockets.
Open wiring between the
above components.
1.
2.
3.
4.
Check bulb.
Check control board.
Check lamp sockets.
Use ohmmeter to check
continuity, and repair
wiring.
Oven heats too fast.
1.
Line voltage is too high
(should be between 108and 132-volts AC).
Control board.
1.
Use separate 15- to 20ampere circuit.
2.
Check control board.
2.
1.
Use separate 15- to 20ampere circuit.
2.
Line voltage is too low
(should be between 108and 132-volts AC).
User error.
2.
3.
Magnetron.
3.
Instruct user regarding
proper cooking times.
Check magnetron.
Speaker does not sound at
conclusion of cooking sequences, or after elapsed time
in Minute Timer.
1.
Open connection or
failed speaker.
Tones are programmed
out.
1.
Replace board.
2.
Program tones back in.
(Touch and hold key #1
for 4-seconds).
Oven cooks on “HIGH” when
a lower cook power is selected.
1.
2.
Shorted relay.
Control board.
1.
2.
Check the control board.
Check control board.
Oven runs but will not cook.
1.
Secondary interlock
switch.
Relay 2 is open.
High voltage components.
1.
Check secondary interlock switch.
Check control board.
Check high voltage components.
Oven cooks too slowly.
1.
2.
2.
3.
3-13
2.
3.
PROBLEM
POSSIBLE CAUSE
TEST PROCEDURE
OR CORRECTION
Console will not display data,
or has incorrect data.
1.
No power at wall plug.
1.
2.
3.
4.
2.
3.
4.
5.
Open line fuse.
Thermal fuse.
Thermal fuse on magnetron.
Interlock safety switches.
6.
Control board.
6.
Check fuse or breaker
box.
Replace line fuse.
Check thermal fuse.
Check magnetron thermal fuse.
Check interlock safety
switches. Replace, if defective.
Check control board.
Erratic console display during operation.
1.
Magnetron.
1.
Check magnetron.
Display continues to count
down when door is open during a “Cook” cycle.
1.
Secondary interlock
switch.
1.
2.
Control board.
2.
Check secondary interlock switch. Replace, if
defective.
Check control board.
1.
Defective control board.
1.
Replace control board.
Oven operates without a
“Start” command.
5.
CHECKING THE MICROWAVE POWER OUTPUT
Use the following procedure to checkout the
operation of the microwave oven.
1.
Fill a 1-cup (260 ml) glass measuring cup
with warm water (between 90˚F/32˚C and
100˚F/38˚C).
2.
Open the oven door, place the container
of water into the oven, and close the door.
3.
Press the COOK keypad, and set the
cooking time for 4-minutes.
4.
Press the START/ENTER keypad. The
oven cavity light should come on, the
cooking cycle should begin, and the timer
should count down in “seconds” from 4:00.
5.
After approximately 2- 1/ 2 to 3-minutes,
the water should start to boil. If more than
3-minutes is required, it could mean that
the operating voltage is low, (below 110volts), or it is not functioning properly and
may need to be checked by a qualified
technician.
3-14
Cooking Products Service Manual
Original March, 1997
4322167
© 1997 Whirlpool Corporation
Page 3-15
CHECKING FOR MICROWAVE ENERGY LEAKAGE
When checking for R.F. Ieakage, use an approved R.F. measuring device to assure less
than 4 mw/cm 2 emission at 5 cm distance with
a maximum scan rate of 2.5 cm/second, in
compliance with U.S. Government Department
of Health, Education and Welfare 21 CFR1030,
performance Standard for Microwave Ovens.
CAUTION
On every service call, checks for microwave
energy emission must be made according to
the following manner.
1.
Remove the cooking rack from the oven
cavity, if the microwave oven is so
equipped.
2.
Place a 275 ML (9. oz.) glass of water in
the center of the oven bottom.
A properly operating door and seal assembly
will normally register small emissions, but they
must be no greater than 4 mw/cm 2 to allow for
measurement uncertainty.
3.
Select “HlGH” cook power, turn the microwave oven on, and test for R.F. Ieakage
using the following pattern:
NOTE: Enter leakage readings in the space
BEFORE and AFTER on the service document.
a) Check
b) Check
c) Check
d) Check
e) Check
f) Check
g) Check
h) Check
around the cabinet at the front.
around the door.
across the console panel.
horizontally across the door
vertically across the door.
diagonally across the door.
across the air vents.
across the rear air vent.
All microwave ovens exceeding the emission
level of 4 mw/cm 2 must be reported to Dept. of
Service for microwave ovens immediately and
the owner should be told not to use the microwave oven until it has been repaired completely.
NOTE: The scan speed is one-inch-per-second.
The interlock monitor switch acts as the final
safety switch protecting the customer from
microwave radiation. If the interlock monitor
switch operates and opens the line fuse, the
interlock switches have failed, and you must
replace all of them (primary and secondary
interlock switches, and the monitor switch),
because their contacts may be melted and
welded together.
If a microwave oven is found to operate with
the door open, report to Dept. of Service, the
manufacturer, and CDRH* immediately. Also
tell the owner not to use the oven.
All repairs must be performed so that microwave energy emissions are minimal.
* CDRH: Center for Device and Radiological health, food, and
drug administration.
EQUIPMENT
• Electromagnetic energy leakage monitor
(NARDA 8100B, HOLADAY H1501).
• 6100 cc glass beaker.
• Glass thermometer 100˚C or 212˚F.
3-15
MAKING THE MEASUREMENTS
To measure for oven leakage:
Measuring The Oven With The
Cabinet Installed
1.
Pour 275 (±25cc) of water into a 600 cc
graduated beaker.
2.
Place the beaker into the center of the
microwave oven.
3.
Set the energy leakage monitor to 2,450
MHz, and use it according to the
manufacturer’s recommended test procedure to obtain the correct results.
4.
Measure the microwave radiation with an
electromagnetic radiation monitor. Hold
the probe perpendicular to the surface
being measured, and measure around
the door viewing window, the exhaust
opening, and air inlet openings.
5.
Operate the oven at its maximum energy
output, and take the measurements.
MEASUREMENT NOTES:
• When measuring for leakage, use the 2 "
(5 cm ) spacer that is provided with the
probe.
• Leakage with the outer panels removed
should be less than 5 mW/cm.sq .
• Leakage for a fully assembled oven (before
the lamp switch primary is interrupted) with
the door opened slightly, should be less
than 2 mW/cm.sq .
• Do not exceed the meter’s full-scale deflection.
• Do not move the test probe along the measuring surfaces faster than 1-inch-per-second (2.5 cm/sec), otherwise a false reading
will occur.
• When testing near a corner of the door,
keep the probe perpendicular to the surface, and move it horizontally without touching the surfaces, otherwise a false reading
will occur.
• Hold the test probe by its gripping surface
only, otherwise a false reading will occur.
Measuring The Oven With The
Cabinet Removed
When the magnetron has been replaced, use
the previous procedure, and measure for microwave energy leakage after all of the necessary components are replaced or adjusted,
and before the cabinet is installed. Take special care to measure around the magnetron
and the waveguide. WARNING: Be careful
not to contact any of the high voltage components when making measurements with
the cabinet removed.
3-16
Cooking Products Service Manual
Original March, 1997
4322167
© 1997 Whirlpool Corporation
MEASURING MICROWAVE
POWER OUTPUT USING THE
IEC-705 RATING STANDARD
Page 3-17
• The time (in seconds) for the temperature of
the water to rise by a value of 10˚C ±2˚ is
measured. The initial and final water temperatures are selected so that the maximum
difference between the final water temperature, and the ambient temperature, is 5˚C.
When determining the microwave oven’s power
output using the IEC-705 rating standard, the
following conditions must be met:
• The microwave power output (in watts) is
calculated, using the following formula:
• When making microwave power output measurements, the oven is supplied with its
rated line voltage, and operated at its maximum power output setting with a load of
1000 (±5) cc of potable water.
(L) 4187 (∆T)
P=
T1
L = time (in seconds).
P = microwave output power.
(∆T) = temperature rise.
• The water is contained in a cylindrical borosilicate glass vessel having a maximum
material thickness of 1/ 8" and an outside
diameter of approximately 7.6 " .
• Microwave power output is measured with
the oven operating at full power. The magnetron filament heat-up time (approximately
2-seconds) is not included.
• The oven and the empty vessel are at ambient temperature prior to the start of the test.
• The initial temperature of the water is 10˚C
±2˚ (50˚F). It is measured immediately before the water is added to the vessel. After
addition of the water to the vessel, the load
is immediately placed on the center of the
shelf, which is in the lowest position, and
the microwave power switched on.
• The water is stirred to equalize the temperature throughout the vessel, prior to measuring the final water temperature.
• Stirring devices and measuring instruments
are selected to minimize the addition or
removal of heat.
3-17
COMPONENT TESTING
FILAMENT WINDING
WARNING
HIGH VOLTAGE
TRANSFORMER
ELECTRICAL SHOCK HAZARD
DISCONNECT THE POWER SUPPLY CORD
FROM THE WALL OUTLET WHEN REMOVING
THE CABINET FROM THE OVEN. PROCEED
WITH THE TESTS ONLY AFTER DISCHARGING THE HIGH VOLTAGE CAPACITOR, AND
REMOVING THE WIRE LEADS FROM THE
PRIMARY WINDING OF THE HIGH VOLTAGE
TRANSFORMER.
SECONDARY
WINDING
PRIMARY WINDING
TEST CHARTS
COMPONENT
High-Voltage Transformer (with
wire leads unplugged).
Magnetron (with wire leads unplugged). NOTE: A microwave
energy leakage test must always
be performed when the oven is
serviced for any reason.
NOTE: Replace the magnetron
if the checks and all of the high
voltage component tests are
good, but the unit still does not
heat a load.
TEST PROCEDURE
RESULT
1. Set the ohmmeter to the
R x 1 scale, and measure
the:
a) Primary winding.
b) Secondary to ground.
c) Filament winding.
a) 0.3 to 0.5 ohms.
b) 65 to 120 ohms.
c) 0.2 to 0.4 ohms
2. Set the ohmmeter to its
R x 1000 scale, and measure the:
a) Primary to ground.
b) Filament to ground.
a) Normal = infinity.
b) Normal = infinity.
1. Set the ohmmeter to the
R x 1 scale, and measure
the:
a) Filament terminal.
2. Set the ommeter to the
R x 1000 scale and measure the:
a) Filament winding to
chassis.
3-18
a) Normal readings - Less
than 1 ohm.
a) Normal = infinity.
Cooking Products Service Manual
Original March, 1997
4322167
© 1997 Whirlpool Corporation
COMPONENT
TEST PROCEDURE
High-Voltage Capacitor
Terminal-To-Terminal
Set the ohmmeter to the R x 10 k
scale, and measure the resistance
across the capacitor terminals.
Page 3-19
RESULT
a) Normal - The meter indicates several ohms, then
gradually returns to infinity.
b) Abnormal - The meter
indicates infinity, or zero
ohms (a short) immediately.
CAPACITOR
Blower Motor Capacitor
Terminal-To-Case
Set the ohmmeter to the R x 1
scale, and measure the resistance
between each terminal and the
case.
a) Normal - The meter indicates infinity.
Terminal-To-Terminal
Set the ohmmeter to the R x 10 k
scale, and measure the resistance
across the capacitor terminals.
a) Normal - The meter indicates several ohms, then
gradually returns to infinity.
b) Abnormal - The meter
indicates zero ohms, or
a short.
b) Abnormal - The meter
indicates infinity, or zero
ohms (a short) immediately.
High-Voltage Rectifier
RECTIFIER
DIODE
CATHODE
Forward Continuity
Set the ohmmeter to the R x 1
scale, and measure the forward
resistance across the rectifier terminals with the (+) lead touching
the anode and the (–) lead touching the cathode.
a) Normal - The meter indicates several ohms.
Reverse Continuity
Set the ohmmeter to its highest
scale, and measure the reverse
resistance across the rectifier terminals with the (+) lead touching
the cathode and the (–) lead touching the anode.
a) Normal - The meter indicates infinity.
b) Abnormal - The meter
indicates infinity, or zero
ohms (a short).
ANODE
3-19
b) Abnormal - The meter
indicates infinity, or zero
ohms (a short).
COMPONENT
TEST PROCEDURE
Switches (with wire leads removed). All of the switches are
measured in the same manner.
N.O. and C Terminals
Set the ohmmeter to the R x 1
scale, and measure the resistance
between the normally-open (N.O.)
and the common (C) terminals of
the switch.
N.C. CONTACTS
C.
RESULT
a) Normal - The meter indicates infinity.
b) Abnormal - The meter
indicates zero ohms (a
short).
N.O. CONTACTS
N.C. and C Terminals
Set the ohmmeter to the R x 1
scale, and measure the resistance
between the normally-closed
(N.C.) and the common (C) terminals of the switch.
a) Normal - The meter indicates continuity, or zero
ohms.
b) Abnormal - The meter
indicates infinity.
Ambient
Temp. (˚F)
60
68
70
80
90
Resistance
Value
75.24 kΩ (±11 kΩ)
62.57 kΩ (±8 kΩ)
59.79 kΩ (±8 kΩ)
45.80 kΩ (±7 kΩ)
36.94 kΩ (±6 kΩ)
Temperature Probe
Set the ohmmeter to the R x 10 k
scale, and measure the temperature probe with the leads positioned at either terminal.
Fan Motor (with leads disconnected).
Set the ohmmeter to the R x 1
scale, and measure across the
terminals.
Blower Motor (with leads disconnected)
Set the ohmmeter to the R x 1
scale, and measure the:
a) High speed windings (blue
and black wires).
a) Normal - High speed: 25
to 45 ohms.
b) Low speed windings (blue
and white wires).
b) Normal - Low speed: 45
to 65 ohms.
Stirrer & Turntable Motors (with
leads disconnected)
Set the ohmmeter to the R x 1
scale, and measure the resistance
between the motor terminals.
3-20
a) Fan Motor - Normal = 130
to 155 ohms.
a) Normal - 1 to 4 ohms.
b) Abnormal - Infinite or
zero ohms.
Cooking Products Service Manual
Original March, 1997
4322167
© 1997 Whirlpool Corporation
Page 3-21
COMPONENT
TEST PROCEDURE
Convection Thermistor
Set the ohmmeter to the R x 10 K
scale.
Remove the 6-pin connector from
the circuit board and measure
across terminals 5 & 6.
a) Normal = 155 K to 350 K
ohms @ 68˚F.
b) Abnormal = Infinity, or
zero ohms (a short).
Convection Heating Element
(with leads disconnected)
Set the ohmmeter to the R x 1
scale, and measure across the
terminals.
a) Normal = 9 to 40 ohms @
68˚F ±2˚.
Gas Sensor
Set the ohmmeter to the R x 1
scale.
Remove the 3-pin connector from
the circuit board and measure the
resistance between:
a) Red & white wire terminals.
b) White & yellow wire terminals.
3-21
RESULT
b) Abnormal = Infinity, or
zero ohms (a short).
a) 20 ohms @ 68˚F ±2˚.
b) Infinite.
COMPONENT
TEST PROCEDURE
Touch Keyboard (see below).
Measure the resistance between
the terminal pins of the keypad
(shown below) that you wish to
check.
For example: To measure the
“CLOCK” keypad, refer to the illustration, and:
1.Find the first terminal number
along the top bar (pin 5).
2.Find the second terminal number in the side bar (pin 8).
3.Set the ohmmeter to the R x 1
scale.
a) Touch the ohmmeter leads
between pins 5 and 8 on the
ends of the FPC connector.
b) Press the CLOCK keypad.
FPC CONNECTOR
(TOP)
1
2
3
4
5
6
7
8
9
10
11
12
13
RESULT
Normal Reading:
100 Ω resistance.
KEYBOARD MATRIX
1
3
2
4
7
6
5
CLOCK
6
0
TIMER
SET
7
1
TIMER
OFF
8
2
BAKED
POTATO
ADD
MINUTE
9
3
REHEAT
COOK
TIME
OFF
CANCEL
4
COOK
POWER
START
ENTER
5
BEVERAGE
8
FROZEN
ENTREE
FAN
POPCORN
DEFROST
9
WARM
HOLD
TURNTABLE
10
11
LIGHT
12
VEGETABLE
COOK
13
3-22
Cooking Products Service Manual
Original March, 1997
4322167
© 1997 Whirlpool Corporation
COMPONENT
TEST PROCEDURE
Relay 2 (RY2)
Set the ohmmeter to the R x 1
scale, and check for continuity
between the two relay terminal
pins. Use the following steps.
1.Remove the wire connectors
from the relay terminals.
2.Use a pair of alligator clips,
and clip the ohmmeter leads
to the two terminals of the relay. Make sure that you do not
allow the clips to short to anything.
3.Plug the microwave oven into
an AC receptical.
4.Set the power level, as shown
in the chart in the right column, and check the relay operation for the ten power levels. NOTE: During the operating time set for each level, the
relay will close (short) for the
time specified in the chart, and
then open for another specified amount of time. When the
open time elapses, the cycle
begins again until the cooking
time elapses and the oven
turns off.
WARNING: When you apply
power to the unit, be careful
not to touch any of the high
voltage circuits.
Page 3-23
RESULT
Power
Level
∞
0
CLOSED
∞
0
OPEN
1
4 Seconds
18 Seconds
2
6 Seconds
16 Seconds
3
8 Seconds
14 Seconds
4
10 Seconds
12 Seconds
5
12 Seconds
10 Seconds
6
14 Seconds
8 Seconds
7
16 Seconds
6 Seconds
8
18 Seconds
4Seconds
9
20 Seconds
2Seconds
10
22 Seconds
0Seconds
CONTROL CIRCUIT BOARD CHECK LIST
The following problems indicate a defective
control circuit board:
4. The buzzer does not sound, or continues
to sound.
5. Some segments of one or more digits do
not light up, or they continue to light up,
or segments light when they should not.
6. Wrong figures appear on the display.
7. The digits on the display flicker.
8. Some of the indicators do not light.
9. The clock does not keep the proper time.
1. The START function fails to operate, but
the high voltage systems, the interlock
switches, the door sensing, and the relay
checks are good.
2. The oven operates okay with a replacement relay installed.
3. Proper temperature measurements cannot be obtained.
3-23
PRIMARY, MONITOR, & SECONDARY SWITCH
CHECKOUT PROCEDURE
NOTE: The following chart and strip circuits show the continuity and position of the door switches
when the microwave oven door is open and closed.
CONTINUITY TEST CHART
DOOR
OPEN
DOOR
CLOSED
Disconnect the 3-pin connector CN3 from the control
module. Check from the pink wire (pin 1) to the blue
wire (pin 3).
–
+
Disconnect the wires at the Secondary Interlock Switch.
Check from the common terminal (white wires) to the
normally-open terminal (white wires).
–
+
Disconnect the wires from the Monitor Switch. Check
from the common terminal (white wires) to the
normally-closed terminal (red wire).
+
–
SWITCH
Primary
Interlock
Secondary
Interlock
Monitor
TESTING
(+) = CONTINUITY
(–) = NO CONTINUITY
DOOR OPEN
L1
N
SECONDARY
INTERLOCK
SWITCH
MONITOR
SWITCH
PRIMARY
INTERLOCK
SWITCH
DOOR CLOSED
L1
N
SECONDARY
INTERLOCK
SWITCH
MONITOR
SWITCH
3-24
PRIMARY
INTERLOCK
SWITCH
Cooking Products Service Manual
Original March, 1997
4322167
© 1997 Whirlpool Corporation
Page 4-1
TECH TIPS
WIRING DIAGRAMS
Models MH7130XE & MH7135XE
BK
MICROCOMPUTER
BOARD
20A LINE
FUSE
BK
BK
BLOWER (VENT)
MOTOR
HI
LOW
MAGNETRON
THERMAL
FUSE
(109˚C/228˚F)
BK
RD
1
LOW-VOLTAGE
TRANSFORMER
W
3
RD
GN
C
RD
CAVITY
THERMAL
FUSE
(110˚C/230˚F)
VR1
3 2 1
N
3 2 1
L
RD
RELAY 2
W
W
BL BK
Y
1 2 3 4 5 6
1 2 3 4 5 6
BL
W
RD
6 mF CAP
RELAY 1
BR
5
COOKTOP LIGHTS
W
OVEN LIGHT
RELAY 3
7
W
W
(C)
1 1
2 2
BK
BK
BK
W
BR
9
RELAY 4
PK
w
STIRRER
MOTOR
BASE
THERMAL
FUSE
FAN
MOTOR
w
RD
Y
11
RELAY 5
13
PH 1
BK
VR 2
BL
15
CN1
Y
BK
2 2
1 1
TURNTABLE
MOTOR
BR
CN5
1
2
W
w
CN2
3
1
2
PK
W
3
RD
(NC)
(C)
(C.)
PRIMARY
INTERLOCK
SWITCH
TURNTABLE
LED
BOARD
MONITOR
SWITCH
BL
(N.O.)
HIGH-VOLTAGE
TRANSFORMER
RD
W
RD
HIGH-VOLTAGE
CAPACITOR
CN1
CN2
1
3
5
7
9
11
13
15
W
RD
BR
BK
PK
YL
BK
BL
1
3
PK BL
PRIMARY
INTERLOCK
SWITCH
MAGNETRON
FA
F
CONTROL MODULE
RECTIFIER
CN4
1
3
W RD BK
SENSOR
RD
CN5
1
W
3
BK
W
T.T. LED
BK = Black
RD = Red
GN = Green
PK = Pink
NOTES:
1. Oven is Off.
2. Door is Open.
4-1
SECONDARY
INTERLOCK
SWITCH
(NO)
BK
BR = Brown
YL = Yellow
BL = Blue
WH = White
Model MH9115XE
MAGNETRON
THERMAL
PROTECTOR
MICROCOMPUTER
BOARD
BK
CAVITY
THERMAL
PROTECTOR
BK
15A LINE
FUSE
BK
BK
W
N
L
W
GN
RD
BL
RELAY #2
W
1
COOKTOP LIGHTS
W
BL
LOW-VOLTAGE
TRANSFORMER
W
RD
RD
W
2
OVEN LIGHT
PK
3
RELAY #1
RD (NC)
(C)
W
BL
PK
(C)
RELAY #3
FAN
MOTOR
BK
BL
5
RELAY #4
BLOWER
MOTOR
BR
6
(LOW)
BASE
THERMAL
PROTECTOR
YL
(HI) RD
BR
YL
MONITOR
SWITCH
(NC)
BR
1
2
BL
RD
(C)
BK
8
3
W
TURNTABLE
MOTOR
RELAY #6
4
BR
YL
(C)
BK
HIGH-VOLTAGE
TRANSFORMER
RD
W
TEMP
PROBE
PK
RD
FA
HIGH-VOLTAGE
CAPACITOR
BL
PRIMARY
INTERLOCK
SWITCH
RECTIFIER
F
RD
W
CONTROL MODULE
W
1
2
PK
RD
BL
BR
YL
BK
3
4
5
6
7
8
8-PIN CONNECTOR
PK
1
2
BL
BR
PK
3
4
1
4-PIN CONNECTOR
BL
2
3
3-PIN CONNECTOR
BK = Black
RD = Red
GN = Green
PK = Pink
NOTES:
1. Oven is Off.
2. Door is Open.
4-2
SECONDARY
INTERLOCK
SWITCH
(NO)
BL
BL
YL
W
RELAY #5
7
W
(NO)
RD
4
BR = Brown
YL = Yellow
BL = Blue
WH = White
MAGNETRON
Cooking Products Service Manual
Original March, 1997
4322167
© 1997 Whirlpool Corporation
Page 4-3
STRIP CIRCUITS
1. UNIT IS PLUGGED IN — CLOCK IS WORKING
L1
N
MICROCOMPUTER
BOARD
20A LINE
FUSE
BK
BK
BK
RD
MAGNETRON
THERMAL
FUSE
RD
3
LOW-VOLTAGE
TRANSFORMER
W
1
CAVITY
THERMAL
FUSE
2. DOOR IS OPEN — OVEN LIGHT IS ON
L1
N
MICROCOMPUTER
BOARD
20A LINE
FUSE
BK
RD
BK
RD
MAGNETRON
THERMAL
FUSE
3
LOW-VOLTAGE
TRANSFORMER
1
CAVITY
THERMAL
FUSE
OVEN LIGHT
RELAY 1
5
BR/RD/BK
W/BL
3. BLOWER MOTOR IS ON “LOW”
N
L1
MICROCOMPUTER
BOARD
20A LINE
FUSE
BK
RD
MAGNETRON
THERMAL
FUSE
RD
BK
CAVITY
THERMAL
FUSE
3
LOW-VOLTAGE
TRANSFORMER
1
W
RELAY 4
CAPACITOR
RD
Y
RELAY 3
9
PK/W
(LOW)
BL
(C)
BLOWER MOTOR
4-3
4. BLOWER MOTOR IS ON “HIGH”
N
L1
MICROCOMPUTER
BOARD
20A LINE
FUSE
BK
RD
BK
RD
MAGNETRON
THERMAL
FUSE
3
LOW-VOLTAGE
TRANSFORMER
CAVITY
THERMAL
FUSE
W
1
CAPACITOR
RD
Y
RELAY 4
BL
BK
13
(HIGH)
(C)
BLOWER MOTOR
5. OVEN IS OFF — CAVITY TEMPERATURE IS ABOVE 133˚F
BLOWER MOTOR IS ON “LOW”
N
L1
MICROCOMPUTER
BOARD
20A LINE
FUSE
BK
RD
BK
BK
MAGNETRON
THERMAL
FUSE
3
CAVITY
THERMAL
FUSE
LOW-VOLTAGE
TRANSFORMER
W
1
RELAY 4
11
CAPACITOR
RD
Y
BL
W
Y
BASE
THERMAL
FUSE
(HIGH)
(C)
BLOWER
MOTOR
6. COOKTOP LIGHTS ARE ON “HIGH” OR “LOW”
N
L1
MICROCOMPUTER
BOARD
20A LINE
FUSE
BK
BK
MAGNETRON
THERMAL
FUSE
RD
BK
3
LOW-VOLTAGE
TRANSFORMER
W
1
COOKTOP LIGHTS
CAVITY
THERMAL
FUSE
W
15
PH1
4-4
BL/BK
W
BK
Cooking Products Service Manual
Original March, 1997
4322167
© 1997 Whirlpool Corporation
Page 4-5
7. MICROWAVE COOKING IS ON
N
L1
MICROCOMPUTER
BOARD
BK
RD
BK
BK
MAGNETRON
THERMAL
FUSE
LOW-VOLTAGE
TRANSFORMER
3
W
W
1
CAVITY
THERMAL
FUSE
OVEN LAMP
W/BL
BK
STIRRER
MOTOR
W
RELAY 1
FAN
MOTOR
BR
5
W
SECONDARY
SWITCH
20A LINE
FUSE
RD
TURNTABLE MOTOR
BK
RELAY 5
7
RELAY 2
BK
RD
W
W
HV
SECTION
8. CONVECTION COOKING IS ON
N
L1
15A LINE
FUSE
BK
BK
MICROCOMPUTER
BOARD
MAGNETRON
THERMAL
FUSE
CAVITY
THERMAL
FUSE
BK
RD
4
LOW-VOLTAGE
TRANSFORMER
W
1
OVEN LIGHT
SWITCH
RELAY #1
3
C
PK
OVEN LIGHT
BL
W
BK
SECONDARY
INTERLOCK
SWITCH
N.O.
BL
TOWER
MOTOR
RELAY #7
9
BK
RD
CIRCULATION
MOTOR
YL
RELAY #9
YL
4-5
PK
BR
CONVECTION
HEATER *
W
W
YL
RD
SPECIFICATIONS
Rated Power Consumption ...................... 1500-watts, maximum (microwave oven only).
1750-watts, maximum (microwave oven,
cooktop lamps, ventilation fan).
Microwave Output ...................................... 850-watts (IEC 705 Test Procedure).
Adjustable 85-watts through 850-watts in 10-steps.
Frequency ................................................... 2450 MHz ±50 MHz.
Power Supply ............................................. 120-volts ±12-volts AC, 60 Hz.
Rated Current............................................. 13-amperes (microwave oven only).
15-amperes (microwave oven, cooktop lamps,
ventilation fan).
Magnetron Cooling .................................... Forced air.
Microwave Stirring ..................................... Stirring fan disk.
Rectification ............................................... Rectification voltage doubler, half-wave.
Door Sealing .............................................. Choke System.
Safety Devices:
Magnetron Thermal Fuse ...................... Opens @ 228˚F/109˚C, resets @ 140˚F/60˚C.
Cavity Thermal Fuse ............................. Opens @ 230˚F/110˚C, resets @ 140˚F/60˚C.
Base Thermal Fuse ............................... Closes @ 133˚F/56˚C, resets @ 104˚F/40˚C.
Line Fuse ................................................ 15-ampere.
Door Interlock Switches ........................ Primary Interlock Switch.
Secondary Interlock Switch.
Interlock Monitor.
Magnetron Type ......................................... 2M214.
High Voltage Capacitor ............................. 0.91 µFd, 2.1 kV AC.
High Voltage Diode ................................... 350 mA, 9.0 kV.
Cooktop Lamp ............................................ 120-volts, 30-watts.
Cavity Lamp ............................................... 125-volts, 30-watts.
Timer ........................................................... Digital, up to 99 minutes, 99 seconds
(in each cooking stage).
Tray ............................................................. Ceramic plate.
4-6
Cooking Products Service Manual
Original March, 1997
4322167
© 1997 Whirlpool Corporation
Page 4-7
SPECIFICATION CHARTS
MODEL NUMBER
MH7130XEQ
MH7130XEZ
MH7135XEB
CONTROL SYSTEM:
Timer:
Yes
Yes
Yes
Type
Electronic
Electronic
Electronic
Limits
99 Min. - 99 Sec.
99 Min. - 99 Sec.
99 Min. - 99 Sec.
Scale
Linear (Digital)
Linear (Digital)
Linear (Digital)
30 Touch Pads
5-Digit - Blue- Green
Fluorescent - Callouts In Display
30 Touch Pads
5-Digit - Blue- Green
Fluorescent - Callouts In Display
30 Touch Pads
5-Digit - Blue- Green
Fluorescent - Callouts In Display
Operation
Display
Microwave Cooking Cycles:
Cook Time
Yes
Yes
Yes
Auto Cook
Yes, Non-Sensored Three Catagory
Yes, Non-Sensored Three Catagory
Yes, Non-Sensored Three Catagory
Yes - Three Category By Weight
Auto Defrost (Non-Sensored)
Yes - Three Category By Weight
Yes - Three Category By Weight
Popcorn
Yes, Non-Sensored Three Settings
Yes, Non-Sensored Three Settings
Yes - Sensored
Baked Potato
Yes, Non-Sensored - Four Settings
Yes, Non-Sensored - Four Settings
Yes - Sensored
Reheat
Yes, Non-Sensored - Five Catagory
Yes, Non-Sensored - Five Catagory
Yes - Sensored -Three Category
Beverage
Yes, Non-Sensored - Two Settings
Yes, Non-Sensored - Two Settings
No
Yes, Two Settings
Yes, Two Settings
Yes, Sensor Cook
Vegetable
Yes, Non-Sensored Three Catagory
Yes, Non-Sensored Three Catagory
Yes, Sensored - Three Catagory
Auto Roast
No
No
No
Warm Hold
5% Power - 99 Min., 99 Sec. Max
5% Power - 99 Min., 99 Sec. Max
5% Power - 99 Min., 99 Sec. Max
Add Minute
Yes
Yes
Yes
Probe Temp
No
No
No
Personal Choice
No
No
Yes
Convection Bake
No
No
No
Convection Broil
No
No
No
Combination Bake
No
No
No
Combination Roast
No
No
No
Frozen Entree
Convection Cooking Cycles:
Combination Cooking Cycles:
Other Hidden Features:
Stoppable Turntable - 12-3/4" Diameter
Yes
Yes
Yes
LED Indicator On Turntable TouchPad
Yes - Red
Yes - Red
Yes - Red
Pause
Door Open
Door Open
Door Open
Clock
Yes
Yes
Yes
Independent Minute Timer
Yes
Yes
Yes
Time Set
Yes
Yes
Yes
Timer Off
Yes
Yes
Yes
No
Yes (4) - Cook I, II, Defrost
Warm Hold
Yes
No
Yes (4) - Cook I, II, Defrost
Warm Hold
Yes
No
Yes (4) - Cook I, II, Defrost
Warm Hold
Yes
More/Less Function
Yes
Yes
Yes
Sales Demonstration Mode
Yes
Yes
Yes
Child Lock
Yes
Yes
Yes
Start/Enter
Yes
Yes
Yes
Off/Cancel
Yes
Yes
Yes
Yes
Yes
Yes
Auto Start
Stage Cooking
In-Use Reprogramming
Variable Power:
Type
Electronic
Electronic
Electronic
Range
0% - 100%
0% - 100%
0% - 100%
Scale
Digital
Digital
Digital
4-7
MODEL NUMBER
MH7130XEQ
MH7130XEZ
MH7135XEB
No
No
No
Type
No
No
No
Range
No
No
No
Scale
No
No
No
Levels
No
No
No
Operation
No
No
No
Timed Override
No
No
No
Yes
Temperature Sensor Probe:
Exhaust Fan:
Yes
Yes
High
Yes
Yes
Yes
Low
Yes
Yes
Yes
Manual Off
Yes
Yes
Yes
Auto Off
Yes
Yes
Yes
Automatic Turn On At 133˚F/56˚C.
Automatic Turn On At 133˚F/56˚C.
Automatic Turn On At 133˚F/56˚C.
Yes
Yes
Yes
High
Yes
Yes
Yes
Low
Yes
Yes
Yes
Note
Cooktop Light:
Manual Off
Yes
Yes
Yes
Auto Off
Yes
Yes
Yes
Wattage
30 Watts
30 Watts
30 Watts
Glass
Glass
Glass
8" W x 3-1/2" H
8" W x 3-1/2" H
8" W x 3-1/2" H
Light Cover
Size of Cover
Display Indicators:
Display Annunciators
Display Words
10 - In Display
10 - In Display
14 - In Display
46 - Spelled In Display
46 - Spelled In Display
49 - Spelled In Display
Microwave Cook Indication
“COOK” Annunciator
“COOK” Annunciator
“COOK” Annunciator
Microwave Stage Indication
No
No
"2" Annunciator Only
Microwave Defrost Indication
“DEF” Annunciator
“DEF” Annunciator
“DEFR” Annunciator
Sensor Cook Indication
No
No
“SENSOR” Annunciator
Convection Cook Indication
No
No
No
Convection Preheat Indication
No
No
No
Combination Cook Indication
No
No
No
“AUTO” Annunciator
“AUTO” Annunciator
“AUTO” Annunciator
Auto Cycle Indication
Auto Start Indication
No
No
No
User Enter Indication
“ENTER” Annunciator
“ENTER” Annunciator
“ENTER” Annunciator
Flashing “START” Annunciator
Flashing “START” Annunciator
“START?” Annunciator
No
No
No
“OZ”
“OZ”
“OZ”
Start Indication
Probe Temp Indication
Weight Indication
“CLOCK” & Colon Flashes
“CLOCK” & Colon Flashes
“CLOCK” & Colon Flashes
Independent Minute Timer
Clock Set
“TIMER” Annunciator
“TIMER” Annunciator
“TIMER” Annunciator
End Of Cooking Reminder
“END”
“END”
“END”
Power Failure Indication
Yes - 88:88 Displayed
Yes - 88:88 Displayed
Yes - 888:88 Displayed
Technical Error Indication
“F-” With Error Number
“F-” With Error Number
“F-” With Error Number
Yes
Yes
Yes
Yes
Yes
Yes
Resonator
Resonator
Resonator
Yes - One Short Beep
Yes - One Short Beep
Yes - One Short Beep
Yes - Two Beeps
Yes - Two Beeps
Yes - Two Beeps
Diagnostic System
Audible Signals:
Type
Programming Tone
(w/On/Off Function)
Between Cycles
(w/On/Off Function)
4-8
Cooking Products Service Manual
Original March, 1997
4322167
© 1997 Whirlpool Corporation
MODEL NUMBER
Page 4-9
MH7130XEQ
MH7130XEZ
MH7135XEB
19" W x 8-9/16" H x 14-5/8" D
19" W x 8-9/16" H x 14-5/8" D
19" W x 8-9/16" H x 14-5/8" D
1.3 Cubic Feet
1.3 Cubic Feet
1.3 Cubic Feet
Epoxy Powder Coat
Epoxy Powder Coat
Epoxy Powder Coat
900 Watts (IEC-705 Rating)
900 Watts (IEC-705 Rating)
900 Watts (IEC-705 Rating)
Forced Air
Forced Air
Forced Air
Spillguard Sealed-In
Spillguard Sealed-In
Spillguard Sealed-In
Yes
Yes - Automatic - Turns on when
oven door is operating. 30-Watt
Extended Life (4000 Hours)
Yes
Yes
Yes - Automatic - Turns on when
oven door is operating. 30-Watt
Extended Life (4000 Hours)
Yes
Yes
Yes - Automatic - Turns on when
oven door is operating. 30-Watt
Extended Life (4000 Hours)
Yes
No
No
No
Yes - With Tempered Cover
Yes - With Tempered Cover
Yes - With Tempered Cover
Water Clear Glass
Water Clear Glass
Low - T Glass
16-1/3" W x 5-5/12" H
17-1/3" W x 5-5/12" H
17-1/3" W x 5-5/12" H
OVEN INTERIOR FEATURES:
Size
Capacity
Finish
Cooking Power
Ventilation
Shelf
Bi-Level Rack
Light
Turntable Roller
Temperature Probe
DOOR FEATURES:
Stamped Steel
Window
Window Size
Window Graphics
White With Dots On Edge
Almond With Dots On Edge
None
Door Screen
White
Almond
Black
Door Baffle
None
None
None
Cooking Guide Label
Yes
Yes
Door Swing
Handle/Latch
Seals
Color
Left Hand (Hinge Side)
Left Hand (Hinge Side)
Yes
Left Hand (Hinge Side)
Textured, Pull to Open
Three Stage
(Capacitive, Reflective & Absorbive)
White
Textured, Pull to Open
Three Stage
(Capacitive, Reflective & Absorbive)
Almond
Textured, Pull to Open
Three Stage
(Capacitive, Reflective & Absorbive)
Black
Top Feed
Ceramic Dome, Horizontally
Cooled with Forced Air
Top Feed
Ceramic Dome, Horizontally
Cooled with Forced Air
Top Feed
Ceramic Dome, Horizontally
Cooled with Forced Air
Three Door/Latch Operated
Switches (1 Power Interrupt,
1 Monitor, 1 Low Voltage)
Two - 1 Magnetron & 1 Oven Cavity
Three Door/Latch Operated
Switches (1 Power Interrupt,
1 Monitor, 1 Low Voltage)
Two - 1 Magnetron & 1 Oven Cavity
Three Door/Latch Operated
Switches (1 Power Interrupt,
1 Monitor, 1 Low Voltage)
Two - 1 Magnetron & 1 Oven Cavity
MICROWAVE SYSTEM:
Distribution
Magnetron
SAFETY FEATURES:
Interlock
Thermal Protectors
VENTILATION SYSTEM:
Type
Duct Outlet Size
Recirculation CFM
Convertible
Convertible
Convertible
3-1/4" H x 10" W
3-1/4" H x 10" W
3-1/4" H x 10" W
120
120
120
Vertical CFM (Hi/Low)
280/180
280/180
280/180
Horizontal CFM (Hi/Low)
300/200
300/200
300/200
Touch Control (2 Speed)
Yes
Yes
Yes
Yes - 133˚F/56˚C
Yes - 133˚F/56˚C
Yes - 133˚F/56˚C
55 dBA
55 dBA
55 dBA
Yes
Yes
Yes
Grease Filter
Yes (2)
Yes (2)
Yes (2)
Blower Type
Twin Squirrel Cage
Twin Squirrel Cage
Twin Squirrel Cage
Vertical
Vertical
Vertical
Auto ON - Low Speed
Noise Level
Damper
Shipped
4-9
MODEL NUMBER
MH7130XEQ
MH7130XEZ
MH7135XEB
29-15/16" W x 16-7/16" H x 15-3/8" D
29-15/16" W x 16-7/16" H x 15-3/8" D
29-15/16" W x 16-7/16" H x 15-3/8" D
White Textured
Unitized Chassis With
Wrapper & Mounting Plate
Painted Steel - Matte Gray
Almond Textured
Unitized Chassis With
Wrapper & Mounting Plate
Painted Steel - Matte Gray
Black Textured
Unitized Chassis With
Wrapper & Mounting Plate
Painted Steel - Matte Black
High Gauge Steel - No Embossments
High Gauge Steel - No Embossments
High Gauge Steel - No Embossments
EXTERIOR FEATURES:
Outside Dimensions
Cabinet Finish
Construction
Bottom Finish
Bottom Construction
Control and Door Frames
Cooktop Light w/Touch Control
Power Cord Length
One Piece Molded - White
One Piece Molded - Almond
One Piece Molded - Black
Two Lamps - 30 Watt Easy Access
Two Lamps - 30 Watt Easy Access
Two Lamps - 30 Watt Easy Access
4-feet
4-feet
4-feet
OTHER SPECIFICATIONS:
Electrical
Domestic Use Only
Agency Approvals
120V, Single Phase, 60 Hz, 1500 Watts 120V, Single Phase, 60 Hz, 1500 Watts 120V, Single Phase, 60 Hz, 1500 Watts
For Use With 15 or 20 Amp Circuit
For Use With 15 or 20 Amp Circuit
For Use With 15 or 20 Amp Circuit
Yes
Yes
Yes
FCC, DHHS, U.L. Listed
FCC, DHHS, U.L. Listed
FCC, DHHS, U.L. Listed
Approximate Shipping Weight
64 lbs.
64 lbs.
64 lbs.
Approximate Net Weight
58 lbs.
58 lbs.
58 lbs.
4158439
4378403
4158311
APPROVED ACCESSORIES:
Filler Kit
Charcoal Filter Kit
4359416
4359416
4359416 (Included)
Exhaust Damper Assembly
Yes (1 Set)
Yes (1 Set)
Yes (1 Set)
Hardware For Installation
Yes (1 Set)
Yes (1 Set)
Yes (1 Set)
4359337
4359337
4359338
LITERATURE:
Use & Care Guide
Installation Instructions
Warranty
Cooking Guide
Cookbook with Hard Cover
Carton Tag
4359330
4359330
4359330
In Use & Care
In Use & Care
In Use & Care
In Use & Care
In Use & Care
In Use & Care
Accessory: 4358520
Accessory: 4358520
Accessory: 4358520
Std. - On Carton Corner
Std. - On Carton Corner
Std. - On Carton Corner
Tech Sheet
4359414
4359414
4359414
Service Manual
4322167
4322167
4322167
4-10
Cooking Products Service Manual
Original March, 1997
4322167
© 1997 Whirlpool Corporation
MODEL NUMBER
MH7135XEQ
MH9115XEB
Page 4-11
MH9115XEQ
CONTROL SYSTEM:
Timer:
Yes
Yes
Yes
Type
Electronic
Electronic
Electronic
Limits
99 Min. - 99 Sec.
99 Min. - 99 Sec.
99 Min. - 99 Sec.
Scale
Linear (Digital)
Linear (Digital)
Linear (Digital)
30 Touch Pads
5-Digit - Blue- Green
Fluorescent - Callouts In Display
37 Touch Pads
5-Digit - Blue- Green
Fluorescent - Callouts In Display
37 Touch Pads
5-Digit - Blue- Green
Fluorescent - Callouts In Display
Cook Time
Yes
Yes
Yes
Auto Cook
Yes, Sensored Three Catagory
No
No
Auto Defrost (Non-Sensored)
Yes - Three Category By Weight
Yes - Three Category By Weight
Yes - Three Category By Weight
Popcorn
Yes - Sensored
Yes - Sensored
Yes - Sensored
Baked Potato
Yes - Sensored
No
No
Yes - Sensored - Three Catagory
Yes
Yes
Operation
Display
Microwave Cooking Cycles:
Reheat
Beverage
Frozen Entree
No
No
No
Yes - Sensor Cook
Yes - Sensor Cook
Yes - Sensor Cook
No
No
Vegetable
Yes- Sensored - Three Catagory
Auto Roast
No
Warm Hold
5% Power - 99 Min., 99 Sec. Max
5% Power - 99 Min., 99 Sec. Max
5% Power - 99 Min., 99 Sec. Max
Add Minute
Yes
Yes
Yes
Probe Temp
No
Yes
Yes
Personal Choice
Yes
No
No
Convection Bake
No
Yes
Yes
Convection Broil
No
Yes
Yes
Combination Bake
No
Yes
Yes
Combination Roast
No
Yes
Yes
No
Yes, Non-Sensored w/Probe 6 Category Yes, Non-Sensored w/Probe 6 Category
Convection Cooking Cycles:
Combination Cooking Cycles:
Other Hidden Features:
Stoppable Turntable - 12-3/4" Diameter
Yes
No
LED Indicator On Turntable TouchPad
Yes - Red
No
No
Pause
Door Open
Door Open
Door Open
Clock
Yes
Yes
Yes
Independent Minute Timer
Yes
Yes
Yes
Time Set
Yes
Yes
Yes
Timer Off
Yes
Yes
Yes
No
Yes (4) - Cook I, II, Defrost
Warm Hold
Yes
Yes - Auto Start; 11 Hr. 59 Min.
Yes (5) - Cook I, II, Defrost
Auto Start, Warm Hold
Yes
Yes - Auto Start; 11 Hr. 59 Min.
Yes (5) - Cook I, II, Defrost
Auto Start, Warm Hold
Yes
More/Less Function
Yes
Yes
Yes
Sales Demonstration Mode
Yes
Yes
Yes
Child Lock
Yes
Yes
Yes
Start/Enter
Yes
Yes
Yes
Off/Cancel
Yes
Yes
Yes
Yes
Yes
Yes
Type
Electronic
Electronic
Electronic
Range
0% - 100%
0% - 100%
0% - 100%
Scale
Digital
Digital
Digital
Auto Start
Stage Cooking
In-Use Reprogramming
Variable Power:
4-11
MODEL NUMBER
MH7135XEQ
MH9115XEB
No
Yes
Yes
No
Electronic
Electronic
Range
No
90˚ F - 200˚F
90˚ F - 200˚F
Scale
No
Digital
Digital
Levels
No
111
111
Operation
No
Direct Entry
Direct Entry
Temperature Sensor Probe:
Type
Timed Override
MH9115XEQ
No
60 Min. If No Increase In Temp. Occurs
60 Min. If No Increase In Temp. Occurs
Yes
Yes
Yes
High
Yes
Yes
Yes
Low
Yes
Yes
Yes
Manual Off
Yes
Yes
Yes
Auto Off
Yes
Yes
Yes
Automatic Turn On At 133˚F/56˚C.
Automatic Turn On At 133˚F/56˚C.
Automatic Turn On At 133˚F/56˚C.
Exhaust Fan:
Note
Cooktop Light:
Yes
Yes
Yes
High
Yes
Yes
Yes
Low
Yes
Yes
Yes
Manual Off
Yes
Yes
Yes
Auto Off
Yes
Yes
Yes
Wattage
30 Watts
30 Watts
30 Watts
Light Cover
Size of Cover
Glass
Glass
Glass
8" W x 3-1/2" H
8" W x 3-1/2" H
8" W x 3-1/2" H
Display Indicators:
Display Annunciators
14 - In Display
21 - In Display
21 - In Display
49 - Spelled In Display
56 - Spelled In Display
56 - Spelled In Display
Microwave Cook Indication
“COOK” Annunciator
“COOK” Annunciator
“COOK” Annunciator
Microwave Stage Indication
"2" Annunciator Only
"2" Annunciator Only
"2" Annunciator Only
Microwave Defrost Indication
“DEFR” Annunciator
“DEFR” Annunciator
“DEFR” Annunciator
"SENSOR" Annunciator
"SENSOR" Annunciator
“SENSOR” Annunciator
Display Words
Sensor Cook Indication
Convection Cook Indication
No
"CONV" Annunciator
"CONV" Annunciator
Convection Preheat Indication
No
"PREHEAT" Annunciator
"PREHEAT" Annunciator
"COMB" Annunciator
Combination Cook Indication
No
"COMB" Annunciator
Auto Cycle Indication
“AUTO” Annunciator
“AUTO” Annunciator
“AUTO” Annunciator
Auto Start Indication
No
"DELAY" Annunciator
"DELAY" Annunciator
User Enter Indication
“ENTER” Annunciator
“ENTER” Annunciator
“ENTER” Annunciator
Start Indication
“START?” Annunciator
“START?” Annunciator
“START?” Annunciator
"TEMP" & "PROBE" Annunciator
Probe Temp Indication
No
"TEMP" & "PROBE" Annunciator
“OZ”
“OZ”
“OZ”
“CLOCK” & Colon Flashes
“CLOCK” & Colon Flashes
“CLOCK” & Colon Flashes
Independent Minute Timer
“TIMER” Annunciator
“TIMER” Annunciator
“TIMER” Annunciator
End Of Cooking Reminder
“END”
“END”
“END”
Power Failure Indication
Yes - 888:88 Displayed
Yes - 888:88 Displayed
Yes - 888:88 Displayed
Technical Error Indication
“F-” With Error Number
“F-” With Error Number
“F-” With Error Number
Yes
Yes
Yes
Yes
Yes
Yes
Resonator
Resonator
Resonator
Yes - One Short Beep
Yes - One Short Beep
Yes - One Short Beep
Yes - Two Beeps
Yes - Two Beeps
Yes - Two Beeps
Weight Indication
Clock Set
Diagnostic System
Audible Signals:
Type
Programming Tone
(w/On/Off Function)
Between Cycles
(w/On/Off Function)
4-12
Cooking Products Service Manual
Original March, 1997
4322167
© 1997 Whirlpool Corporation
MODEL NUMBER
Page 4-13
MH7135XEQ
MH9115XEB
MH9115XEQ
19" W x 8-9/16" H x 14-5/8" D
18-3/16" W x 8-5/32" H x 12-5/8" D
18-3/16" W x 8-5/32" H x 12-5/8" D
1.3 Cubic Feet
1.1 Cubic Feet
1.1 Cubic Feet
Epoxy Powder Coat
Epoxy Powder Coat
Epoxy Powder Coat
900 Watts (IEC-705 Rating)
850 Watts (IEC-705 Rating)
850 Watts (IEC-705 Rating)
Forced Air
Forced Air
Forced Air
Spillguard Sealed-In
Spillguard Sealed-In
Spillguard Sealed-In
Yes
Yes - Automatic - Turns on when
oven door is operating. 30-Watt
Extended Life (4000 Hours)
Yes
Yes
Yes - Automatic - Turns on when
oven door is operating. 30-Watt
Extended Life (4000 Hours)
No
Yes
Yes - Automatic - Turns on when
oven door is operating. 30-Watt
Extended Life (4000 Hours)
No
No
Yes
Yes
Yes - With Tempered Cover
Yes - With Tempered Cover
Yes - With Tempered Cover
Water Clear Glass
Low - T Glass
Water Clear Glass
17-1/3" W x 5-5/12" H
15.9" W x 5.3" H
15.9" W x 5.3" H
White With Dots On Edge
None
White With Dots On Edge
Door Screen
White
Black
White
Door Baffle
None
Black
White
Cooking Guide Label
Yes
Yes
OVEN INTERIOR FEATURES:
Size
Capacity
Finish
Cooking Power
Ventilation
Shelf
Bi-Level Rack
Light
Turntable Roller
Temperature Probe
DOOR FEATURES:
Stamped Steel
Window
Window Size
Window Graphics
Door Swing
Handle/Latch
Seals
Color
Left Hand (Hinge Side)
Left Hand (Hinge Side)
Yes
Left Hand (Hinge Side)
Textured, Pull to Open
Three Stage
(Capacitive, Reflective & Absorbive)
White
Textured, Pull to Open
Three Stage
(Capacitive, Reflective & Absorbive)
Black
Textured, Pull to Open
Three Stage
(Capacitive, Reflective & Absorbive)
White
Top Feed
Ceramic Dome, Horizontally
Cooled with Forced Air
Bottom Feed Using Motor Driven Ant.
Ceramic Dome, Horizontally
Cooled with Forced Air
Bottom Feed Using Motor Driven Ant.
Ceramic Dome, Horizontally
Cooled with Forced Air
Three Door/Latch Operated
Switches (1 Power Interrupt,
1 Monitor, 1 Low Voltage)
Two - 1 Magnetron & 1 Oven Cavity
Three Door/Latch Operated
Switches (1 Power Interrupt,
1 Monitor, 1 Low Voltage)
Two - 1 Magnetron & 1 Oven Cavity
Three Door/Latch Operated
Switches (1 Power Interrupt,
1 Monitor, 1 Low Voltage)
Two - 1 Magnetron & 1 Oven Cavity
MICROWAVE SYSTEM:
Distribution
Magnetron
SAFETY FEATURES:
Interlock
Thermal Protectors
VENTILATION SYSTEM:
Type
Duct Outlet Size
Recirculation CFM
Convertible
Convertible
Convertible
3-1/4" H x 10" W
3-1/4" H x 10" W
3-1/4" H x 10" W
120
120
120
Vertical CFM (Hi/Low)
280/180
280/180
280/180
Horizontal CFM (Hi/Low)
300/200
300/200
300/200
Touch Control (2 Speed)
Yes
Yes
Yes
Yes - 133˚F/56˚C
Yes - 133˚F/56˚C
Yes - 133˚F/56˚C
55 dbA
55 dbA
55 dbA
Yes
Yes
Yes
Grease Filter
Yes (2)
Yes (2)
Yes (2)
Blower Type
Twin Squirrel Cage
Twin Squirrel Cage
Twin Squirrel Cage
Vertical
Recirculating
Recirculating
Auto ON - Low Speed
Noise Level
Damper
Shipped
4-13
MODEL NUMBER
MH7135XEQ
MH9115XEB
MH9115XEQ
19" W x 8-9/16" H x 14-5/8" D
29-7/8" W x 16-3/16" H x 14" D
29-7/8" W x 16-3/16" H x 14" D
White Textured
Unitized Chassis With
Wrapper & Mounting Plate
Painted Steel - Matte Gray
Black Textured
Unitized Chassis With
Wrapper & Mounting Plate
Painted Steel - Matte Black
White Textured
Unitized Chassis With
Wrapper & Mounting Plate
Painted Steel - Matte Gray
High Gauge Steel - No Embossments
High Gauge Steel - No Embossments
High Gauge Steel - No Embossments
One Piece Molded - White
One Piece Molded - Black
One Piece Molded - White
Two Lamps - 30 Watt Easy Access
Two Lamps - 30 Watt Easy Access
Two Lamps - 30 Watt Easy Access
4-feet
4-feet
4-feet
EXTERIOR FEATURES:
Outside Dimensions
Cabinet Finish
Construction
Bottom Finish
Bottom Construction
Control and Door Frames
Cooktop Light w/Touch Control
Power Cord Length
OTHER SPECIFICATIONS:
Electrical
Domestic Use Only
Agency Approvals
120V, Single Phase, 60 Hz, 1500 Watts 120V, Single Phase, 60 Hz, 1500 Watts 120V, Single Phase, 60 Hz, 1500 Watts
For Use With 15 or 20 Amp Circuit
For Use With 15 or 20 Amp Circuit
For Use With 15 or 20 Amp Circuit
Yes
Yes
Yes
FCC, DHHS, U.L. Listed
FCC, DHHS, U.L. Listed
FCC, DHHS, U.L. Listed
Approximate Shipping Weight
64 lbs.
79 lbs.
79 lbs.
Approximate Net Weight
58 lbs.
69 lbs.
69 lbs.
33-7/16" W x 19-5/16" H x 19-17/32" D
33" W x 17-3/8" H x 18-3/16" D
33" W x 17-3/8" H x 18-3/16" D
Carton Dimensions
APPROVED ACCESSORIES:
Filler Kit
4158439
4158311
4158439
4359416 (Included)
4359416 (Included)
4359416 (Included)
Exhaust Damper Assembly
Yes (1 Set)
Yes (1 Set)
Yes (1 Set)
Hardware For Installation
Yes (1 Set)
Yes (1 Set)
Yes (1 Set)
Use & Care Guide
4359338
4359339
4359339
Installation Instructions
4359330
4359330
4359330
Warranty
In Use & Care
In Use & Care
In Use & Care
Cooking Guide
In Use & Care
In Use & Care
In Use & Care
Charcoal Filter Kit
LITERATURE:
Cookbook with Hard Cover
Accessory: 4358520
Accessory: 4358520
Accessory: 4358520
Carton Tag
Std. - On Carton Corner
Std. - On Carton Corner
Std. - On Carton Corner
Tech Sheet
4359414
4359414
4359414
Service Manual
4322167
4322167
4322167
4-14
Cooking Products Service Manual
Original March, 1997
4322167
© 1997 Whirlpool Corporation
MODEL & SERIAL NUMBER EXPLANATION
MODEL NUMBER
M
H
7
13 0
X E Q
0
INTERNATIONAL SALES IND.
OR MARKETING CHANNEL, IF PRESENT
PRODUCT GROUP
M = MICROWAVE
PRODUCT IDENTIFICATION
B = BROWNER
C = CONVECTION
G = GRILL / CRISPER
H = OTR HOOD COMBO
K = KITS
S = STIRRER FAN
T = TURNTABLE
MODEL VARIATIONS
0-9
CUBIC FEET
04 = .4 CU. FT.
06 = .6 CU. FT.
07 = .7 CU. FT.
08 = .8 CU. FT.
09 = .9 CU. FT.
10 = 1.0 CU. FT.
12 = 1.2 CU. FT.
13 = 1.3 CU. FT.
14 = 1.4 CU. FT.
16 = 1.6 CU. FT.
FEATURE LEVEL
0 = 30" KIT (IF KIT)
2 = 22" KIT (IF KIT)
4 = 24" KIT (IF KIT)
5 = SENSORED MODEL
7 = 27" KIT (IF KIT)
FEATURE CODE
C = CSA APPROVED
X = FEATURE NOT DEFINED
YEAR OF INTRODUCTION
D = 1996
E = 1997
COLOR CODE
B = BLACK
Q = WHITE
Z = ALMOND
ENGINEERING CHANGE (0, 1, 2, ETC.)
SERIAL PLATE LOCATION
4-15
Page 4-15
WHIRLPOOL MICROWAVE HOOD WARRANTY
LENGTH OF WARRANTY
ONE YEAR FULL WARRANTY
From Date of Installation.
SECOND THROUGH FIFTH YEAR
LIMITED WARRANTY
From Date of Installation.
WHIRLPOOL
WILL PAY FOR:
FSP® replacement parts and repair labor
costs to correct defects in materials or
workmanship. Service must be provided
by an authorized Whirlpool service company.
Replacement of microwave magnetron
tube on microwave oven to correct defects in materials or workmanship.
For convection cooking models, replacement parts for the electric element to
correct defects in materials or workmanship.
WHIRLPOOL
WILL NOT PAY FOR:
A. Service calls to:
1. Correct the installation of the
oven.
2. Instruct you how to use the oven.
3. Replace house fuses or correct
house wiring.
B. Repairs when oven is used in other
than normal home use.
C. Damage resulting from accident,
alteration, misuse, abuse, improper
installation or installation not in accordance with local electrical codes.
D. Any labor costs during the limited
warranty.
E. Replacement parts or repair labor
costs for units operated outside the
United States.
F. Pickup and delivery. This product is
designed to be repaired in the home.
G. Repairs to parts or systems caused
by unauthorized modifications made
to the appliance.
WHIRLPOOL DOES NOT ASSUME ANY RESPONSIBILITY FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES. Some states do not allow
the exclusion or limitation of incidental or consequential damages, so this exclusion may not apply to you. This warranty gives you specific legal
rights, and you may also have other rights which vary from state-to-state.
Outside the United States and Canada, a different warranty may apply. For details, please contact your authorized Whirlpool dealer.
If you need service, first see the “If You Need Assistance or Service” section of the Use and Care Guide. After checking “If You Need Assistance
or Service,” additional help can be found by calling our Consumer Assistance Center telephone number, 1-800-253-1301, from anywhere in the
U.S.A.
® Registered Trademark/SM Service Mark of Whirlpool Corporation
4-16

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