Troubleshooting. Honeywell Thermostat RTH6500WF, RTH6580WF, RTH6500WF

Troubleshooting

If you have difficulty with your thermostat, please try the following suggestions.

Most problems can be corrected quickly and easily.

Display is blank

• Check circuit breaker and reset if necessary.

• Make sure power switch at heating and cooling system is on.

• Make sure furnace door is closed securely.

• Make sure C wire is connected (see page 13).

Cannot change system setting to Cool

Fan does not turn on when heat is required

• Check Function 1: System Type to make sure it is set to match your heating and cooling equipment (see page 50).

• Check Function 3: Heating Fan Control to make sure it is set to match your heating equipment (see page 51).

Cool On or Heat

On is flashing on the screen

• Compressor protection feature is engaged. Wait 5 minutes for the system to restart safely, without damage to the compressor.

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Troubleshooting

Heat pump issues cool air in heat mode, or warm air in cool mode

Heating or cooling system does not respond

• Check Function 2: Heat Pump Changeover Valve to make sure it is properly configured for your system (see page 50).

• Press System to set system to Heat. Make sure the temperature is set higher than the Inside temperature.

• Press System to set system to Cool. Make sure the temperature is set lower than the Inside temperature.

• Check circuit breaker and reset if necessary.

• Make sure power switch at heating & cooling system is on.

• Make sure furnace door is closed securely.

• Wait 5 minutes for the system to respond.

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Troubleshooting

Heating system is running in cool mode

• Check Function 1: System Type to make sure it is set to match your heating and cooling equipment (see page 50).

Heating and cooling equipment are running at the same time

• Check Function 1: System Type to make sure it is set to match your heating and cooling equipment (see page 50).

• Grasp and pull thermostat away from wallplate. Check to make sure bare wires are not touching each other.

• Check thermostat wiring is correct.

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Glossary

C wire

The “C” or common wire brings 24 VAC power to the thermostat from the heating/cooling system.

Some older mechanical or battery operated thermostats may not have this wire connection. It is necessary for establishing a Wi-Fi connection to your home network.

Heat Pump heating/cooling system

Heat pumps are used to heat and cool a home. If your old thermostat has a setting for auxiliary or emergency heat, you likely have a heat pump.

Conventional heating/cooling system

Non–heat pump type systems; these include air handlers, furnaces or boilers that run on natural gas, oil or electricity. They may or may not include an air conditioner.

Jumper

A small piece of wire that connects two terminals together.

MAC ID, MAC CRC

Alphanumeric codes that uniquely identify your thermostat.

QR Code ®

Quick response code. A two-dimensional,machine-readable image. Your wireless device can read the black and white pattern in the square and link its browser directly to a web site. QR Code is a registered trademark of DENSO WAVE INCORPORATED.

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Regulatory information

FCC Compliance Statement (Part 15.19) (USA only)

This device complies with Part 15 of the FCC Rules.

Operation is subject to the following two conditions:

1 This device may not cause harmful interference, and

2 This device must accept any interference received, including interference that may cause undesired operation.

FCC Warning (Part 15.21) (USA only)

Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.

FCC Interference Statement (Part 15.105 (b))

(USA only)

This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to

Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one of the following measures:

• Reorient or relocate the receiving antenna.

• Increase the separation between the equipment and receiver.

• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.

• Consult the dealer or an experienced radio/TV technician for help.

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Regulatory information

Thermostats

To comply with FCC and Industry Canada RF exposure limits for general population/ uncontrolled exposure, the antenna(s) used for these transmitters must be installed to provide a separation distance of at least 20 cm from all persons and must not be co-located or operating in conjunction with any other antenna or transmitter.

Section 7.1.2 of RSS-GEN

Under Industry Canada regulations, this radio transmitter may only operate using an antenna of type and maximum (or lesser) gain approved for the transmitter by

Industry Canada. To reduce potential radio interference to other users, the antenna type and its gain should be so chosen that the equivalent isotropically radiated power (e.i.r.p.) is not more than that necessary for successful communication.

Section 7.1.3 of RSS-GEN

Operation is subject to the following two conditions:

1 this device may not cause interference, and

2 this device must accept any interference, including interference that may cause undesired operation of the device.

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