TROUBLESHOOTING. LG LDFN4542S

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TROUBLESHOOTING

FAQs: Frequently Asked Questions

Q: Does this dishwasher require a rinse aid to be used?

A: Rinse aid is strongly recommended to enhance the drying performance of the dishwasher. In order to be more energy efficient, the hybrid drying system does not use a heating element to assist in drying, so a rinse aid plays an integral role in the drying process. If a rinse aid is not used, water may remain on the dishes and the tub. Rinse aid helps to ensure that the majority of the water has been sheeted off of the dishes at the end of the rinse and that the load is ready for the dry cycle.

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What can be done if my dishes have a cloudy, white film on them after a wash?

The cloudy film is usually caused by minerals in the water reacting with the dishwasher detergent.

First, be certain not to use too much detergent. Refer to Adding Detergent to the Dispenser section for recommended detergent amounts. Add an extra rinse to the cycle. LG Dishwashers use less water than traditional dishwashers, so adding an extra rinse aids in rinsing the film away. If the water supply is hard, it may be necessary to add a performance booster that addresses the hard water condition.

How do I remove white film on the tub?

Measure 3 tbsp. (40 g) of citric acid powder and use it to fill the main detergent compartment.

Run a Machine Clean cycle. Do not use detergent.

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What steps can I take to improve drying results?

Drying performance is directly affected by the amount of heat that remains in the tub after the heated rinse is performed. If your dishwasher is far away from your home’s hot water heater, it may be necessary to run the hot water tap in the sink before starting a wash cycle, to ensure that cool water is purged from the hot water lines. This will ensure your dishwasher has a consistent supply of hot water from start to finish. Using the High Temp setting also aids in keeping the inner drum temperature and dishes hotter before drying begins.

LG dishwashers are designed to be used in conjunction with a rinse aid. Using a rinse aid will maximize the amount of water that has already been sheeted away from the dishes before the dry cycle begins. If a rinse aid is used and the performance still needs a boost, adjust the amount of rinse aid used. 2 is the default setting, but if necessary set the level to 3 so more rinse aid is used.

Water tends to bead rather than sheet off plastic and nonstick surfaces, making them more difficult to dry. If washing plastic items in a Normal cycle, select the Extra Dry or Night Dry option or both for better drying results. When the rinse aid is empty, the Extra Dry option is selected automatically.

Allow the dishwasher to completely finish the dry cycle before opening the door. If the door is opened in the middle of the dry cycle, the heat that is necessary for the hybrid dry system to work will escape. This will cause all of the dishes inside to remain wet once the cycle finishes.

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What is the hybrid drying system?

The dishwasher does not rely on a heating element for the drying process; instead, it relies on the heat that is retained by the dishes and the tub during the wash and rinse cycles to turn the moisture in the tub into humidity.

Warm, moist air in the dishwasher is then pulled into a condensing duct in the door by a fan. The air then cools, which causes the humidity to condense. Room temperature air is also drawn into the duct to help the air cool down faster. When this moisture condenses into a liquid, it is drained out.

NOTE

• Rinse aid is required to enhance the drying performance. If no rinse aid is used, water may remain on the dishes and the tub.

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Why am I hearing a whistling sound from the dishwasher?

It is important to determine the duration of the noise and when it happens (what part of the cycle).

When water is drawn into the dishwasher, a whistling noise can be heard. This is normal. If the water pressure is too high, it will be louder, so it may be necessary to adjust the water valve to lower the pressure if the noise is too loud.

What kinds of dishes can be placed in the dishwasher?

Ensure that the dishes you place in the dishwasher are dishwasher safe. Plastic dishware will not dry as effectively as glass and metal dishware. Plastic items do not retain heat as well as glass and metal dishware. Plastic cups and dishes may require some hand drying before being put away at the end of the cycle.

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Can I perform a drain only cycle?

To drain standing water, press and hold Start for three seconds until the cycle stops. Once the dishwasher finishes draining, the power turns off.

Why does my dishwasher continuously chime if I open the door during a cycle or right after the cycle has finished?

This is normal. The dishwasher is letting you know that the interior temperatures of the unit are hot and to use caution when placing your hands inside. Once the unit has cooled down, the chiming will stop.

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What is Control Lock and how is it activated?

Control Lock is a feature that prevents the controls from being changed during the cycle. It does not prevent the door from being opened or the unit from being powered off. To activate or deactivate, press and hold Half Load and Energy Saver simultaneously for three seconds.

Can I add an extension to the drain hose?

If an extension drain hose is required, use 5 /

8 for connecting the two hose ends.

" or 7 /

8

" inside diameter, 2-3 ft. length hose and a coupler

An LED is blinking, the machine is chiming, and the dishwasher won't start. What is wrong with the dishwasher?

This is a safety feature. The door must be closed within four seconds of pressing the Start button.

If the door is not closed within four seconds, an LED flashes, an audible alert sounds, and the dishwasher does not operate. To start the dishwasher, open the door and either close the door and press Start (front controls) or press Start and close the door within four seconds (top controls).

Before loading dishes, should I pre-rinse dishes?

No, you don't need to pre-rinse the dishes before loading especially if using the Normal and Auto cycles. The dishwasher washes dishes clean without pre-rinsing.

User Support Videos

For further assistance, there are videos and tutorials available through the LG.com website.

1 On the www.lg.com/us home page, click on the Support menu tab to bring up the menu selections. Select Video Tutorials .

2 Select a product category and then pick a topic or search a keyword.

Scan this QR code to quickly access the video search page on the LG website.

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Before Calling for Service

The appliance is equipped with an automatic error-monitoring system to detect and diagnose problems at an early stage. If the appliance does not function properly or does not function at all, check the following before you call for service.

Odor

Problem

Dishwasher will not operate.

Dishwasher operates too long.

Water remains in tub after completion of cycle.

Food soil remains on dishes.

Possible Cause & Solution

Start button is not pressed.

• Press the Start button.

Door is not completely closed.

• Make sure that the door is completely closed and latched.

Power supply or power supply line is not connected.

• Connect the power supply or power supply line properly.

Fuse is blown or circuit breaker tripped.

• Replace the fuse or reset the circuit breaker.

Control Lock is activated.

• Deactivate Control Lock.

Dishwasher is connected to cold water.

• Check the water supply connection or water heater setting. (Heating cold water takes longer.)

The previous cycle was stopped before completion and residual water remains in the dishwasher.

• Turn on the power, run the Cancel cycle option to remove the residual water, then run the Turbo cycle using detergent but with the dishwasher empty.

There is food in the bottom of the unit or in the filter.

• Clean the filter and the interior according to the Maintenance section of the owner’s manual.

Unwashed dishes are left in the unit for a long time.

• Cycle with one cup of white vinegar in a dishwasher safe glass or bowl placed on the upper rack. (Vinegar is an acid, and with constant use it could damage your appliance.)

Drain hose is kinked or clogged.

• Adjust hose or clear blockage.

Improper cycle selection.

• Select correct cycle based on soil level and type of dishware being washed.

Water temperature is too low.

• Check water supply connection or water heater setting.

Dishwashing detergent was not used.

• Use recommended detergent.

Low inlet water pressure.

• Water pressure should be between 20 and 80 psi.

Water jet holes on spray arms blocked.

• Clean the spray arms.

Improper loading of dishes.

• Make sure dishes do not block spray arm rotation or interfere with detergent dispenser.

Filters are clogged.

• Clean filters.

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Problem

Cloudiness on glassware.

Black or gray marks on dishes.

Yellow or brown film on inside surfaces of dishwasher.

Spots and filming on dishes.

Noise

Dishes don’t dry.

Lamps do not illuminate.

Spray arms do not rotate smoothly.

Upper rack is crooked.

Possible Cause & Solution

Combination of excessive detergent and hard water.

• Use less detergent and use a rinse aid to minimize the problem.

Aluminum items rubbing dishes during cycle.

• Reposition the dishes.

Coffee or tea stains.

• Eliminate the stain by using a stain removal product.

Low water temperature.

• Water supply should be at least 120 °F for best wash performance.

Overloading.

• Do not overload the dishwasher.

Improper loading.

• See the Operation section.

Insufficient water pressure.

• Water pressure should be between 20 and 80 psi.

Insufficient detergent.

• Add the recommended amount of detergent. See the Operation section.

Rinse aid dispenser is empty.

• Refill rinse aid dispenser.

Hard water buildup in the tub.

• Remove all dishes, silverware and silverware holder from dishwasher. Only racks should remain in tub. For best results, use citric acid powder (can be found in canning sections of most grocery stores or online). Measure 3 tablespoons (40 g) of citric acid powder. Fill main wash compartment with measured powder. If you cannot find citric acid powder, pour approximately one cup (200-300 mL) of white vinegar into shallow bowl and place in upper rack. Run Machine Clean cycle. Do not use detergent.

Some level of noise is normal during operation.

• Detergent cover opening.

• Drain pump at the beginning of drain cycle.

The dishwasher is not level.

• Adjust leveling feet.

Nozzle arm knocking against dishes.

• Reposition the dishes.

Rinse agent dispenser empty.

• Check and refill the rinse agent dispenser if empty.

Power is not connected.

• Connect power supply.

Holes of spray arms are blocked by food particles.

• Clean the holes of spray arms.

Rack is poorly adjusted.

• See the Height Adjustable Upper Rack section.

Dishwasher continuously chimes when the door is opened, during or right after a cycle has completed.

Door does not close completely.

This is a safety measure. Contact with escaping steam or the hot contents of the dishwasher could result in injury.

• Close the door until the dishwasher and dishes have cooled down. The chiming will stop if the door is closed or the interior temperature has cooled.

Cutlery rack is not properly loaded.

• Push the door handle to close the door properly until it clicks.

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Problem

Dishwasher chimes if panel is touched during operation.

Dishwasher did not finish cycle.

Leaking in front of unit

P1, P2, P3, or P4 appears in display.

n:#, U:#, d:#, t# appearsin display.

(# = a number)

Possible Cause & Solution

Bumping into or touching the control panel during operation may result in a disabled button sound. Only the Power, Start, and Control Lock buttons are enabled during operation to prevent cycle settings from being changed inadvertently.

• Button sounds can be turned off by pressing and holding seconds.

Half Load for three

• The end of cycle chime and safety alert sounds will still sound.

Door was opened during cycle.

• If the door is opened during a cycle, the Start key must be pressed within 4 minutes or the machine turns off and all settings are lost.

Dishwasher not leveled properly.

• Verify the unit is level from side to side and from front to back. See leveling instructions in the Installation section.

Wrong detergent used.

• If excessive sudsing is causing the leak, allow the foam to subside for 24 hours then clean the inside of the tub with milk.

The Download cycle is selected.

• This is not an error code. This code indicates the current Download cycle.

Test mode is selected.

• This is not an error code. This code is used when testing the dishwasher. Power the unit off and on and the code will disappear.

L0, L1, L2, L3 or L4 appears in display.

CL appears in display.

Rinse Aid Level setting mode is selected.

• This is not an error code. This code indicates the current rinse aid level. For more information, refer to the Adding Cleaning Agents section.

Control Lock is activated.

• This is not an error code. This code indicates that the control lock is activated. Press and hold Half Load and Energy Saver simultaneously for three seconds.

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Error Codes

Problem Possible Cause & Solution

Water inlet problem.

• Check for a clogged, kinked or frozen water inlet hose.

• Check water supply.

Drainage Problem.

• Check for a clogged, kinked or frozen water drain hose.

Air gap or disposal is clogged.

• Clean air gap or disposal.

Filters are clogged.

• Clean Filters.

Oversudsing caused by improper detergent, such as dish soap.

• Do not use hand dishwashing liquids. Only use detergents which are designed for use in automatic dishwashers.

• To remove detergent residue in the tub, pour approximately 4-8 oz(100~200 mℓ) of milk into a shallow bowl, place it in the upper rack and then run the appliance on the

Auto cycle.

Failure to level dishwasher.

• Make sure that the appliance is properly leveled.

Water leakage

• Turn off the water supply to the dishwasher and call an LG Electronics Customer

Information Center at 1-800-243-0000 (U.S.A.) or 1-888-542-2623 (Canada).

• The dishwasher makes an alert sound for 10 seconds, and runs the drain pump intermittently. If power is turned off to the machine, the machine powers back on automatically until the AE error is resolved.

Excessive Water supplied.

• Please call an LG Electronics Customer Information Center at 1-800-243-0000

(U.S.A.) 1-888-542-2623 (Canada).

Heater circuit failure.

• Please call an LG Electronics Customer Information Center at 1-800-243-0000

(U.S.A.) 1-888-542-2623 (Canada).

Thermistor failure.

• Please call an LG Electronics Customer Information Center at 1-800-243-0000

(U.S.A.) 1-888-542-2623 (Canada).

Motor trouble

• Please call an LG Electronics Customer Information Center at 1-800-243-0000

(U.S.A.) 1-888-542-2623 (Canada).

Vario motor trouble

• Please call an LG Electronics Customer Information Center at 1-800-243-0000

(U.S.A.) 1-888-542-2623 (Canada).