Category: LG

Problem: Thermal Error. Water temperature sensed above 194°F or thermistor failure.

How to Fix tE Error

1. Turn off power to the unit.
2. This error usually requires removing the dishwasher from the cabinet to access the sump area underneath.
3. Locate the thermistor (temperature sensor), which is inserted into the sump assembly.
4. Measure resistance with a multimeter if possible (should be ~11k ohms at room temp); if open or shorted, replace the thermistor.
5. Ensure wiring connections to the thermistor are tight and free of corrosion.

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Problem: Bubble Error. Excessive suds detected.

How to Fix bE Error

1. This error indicates too many suds (bubbles) in the tub, usually from using standard dish soap instead of dishwasher detergent.
2. Pour 1/4 cup of cooking oil or milk into the tub to break down the foam.
3. Run a drain cycle or a rinse-only cycle to clear the remaining suds.
4. Verify the unit is level; improper leveling can sometimes trigger this sensor.

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Problem: Current Error / Motor Error. Indicates an issue with the motor or its wiring harness.

How to Fix CE Error

1. Hard reset the machine by flipping the breaker off for 5 minutes.
2. Inspect the main wiring harness at the door hinge for broken or pinched wires (very common on LG models).
3. If wiring is good, the issue is likely high amperage draw from the Circulation Motor.
4. Replace the Circulation Motor. If the new motor does not fix the issue, the Main Control Board may have been damaged by the motor short.

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Problem: Heater Error. Water failed to heat or overheated (above 149°F).

How to Fix HE Error

1. Turn off power. Inspect the wiring to the heating element (often integrated into the heater case or pump housing on newer models).
2. Use a multimeter to test the heater for continuity (resistance should be 10-30 ohms). If the heater reads ‘infinity’ (open line), replace the heating element assembly.
3. If the heater tests good, the thermistor may be reporting incorrect temperatures (see tE fix).
4. If both heater and thermistor are good, the heater relay on the Main Control Board has likely failed.

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Problem: Power Failure. Indicates a disruption in power supply.

How to Fix PF Error

1. This is a notification that power was lost during a cycle (storm, tripped breaker, loose plug).
2. Press any button on the control panel to clear the code.
3. Restart the cycle if the dishes are not clean.
4. If this happens frequently without a home power outage, check that the power cord is securely plugged in and the outlet terminals are tight.

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Problem: Vario Motor Error. Issue with the vario motor (diverter) controlling spray arms.

How to Fix nE Error

1. Turn off power and water; uninstall the dishwasher and pull it out.
2. Lay the unit on its back to access the bottom sump assembly.
3. Locate the Vario Motor (diverter motor), which switches water between the top and bottom spray arms.
4. Remove the screws holding the motor and disconnect the wire harness.
5. Install the new Vario Motor, ensuring the cam shaft is aligned correctly.

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Problem: Leak Error. Water detected in the base pan (flood switch tripped).

How to Fix AE Error

1. This code means the flood sensor in the bottom base pan is wet. Turn off the water supply immediately.
2. Remove the kickplate and use a sponge or towel to dry out the water in the base pan.
3. Run a short cycle while watching underneath with a flashlight to find the active leak (hoses, pump seal, or door seal).
4. Fix the leak source. If the pan is dry but the code remains, the flood sensor itself is stuck or faulty.

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Problem: Pressure Sensor Error. Issue with the water level sensor.

How to Fix PE Error

1. Disconnect power. Remove the side panel or kickplate to access the water level sensor (pressure switch).
2. Check the small rubber hose connecting the sensor to the sump for kinks, holes, or blockage (gunk build-up).
3. Clean the hose if blocked.
4. If the hose and wiring are good, replace the Pressure Sensor assembly.

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Problem: Auto Open Door Error. The mechanism to pop the door open for drying has failed.

How to Fix F37 Error

1. This code applies to models with an auto-open drying feature.
2. Open the door and remove the screws securing the inner door panel to separate it from the outer skin.
3. Locate the door latch/motor assembly at the top center.
4. Replace the latch motor assembly if it fails to extend or retract the plunger.
5. Ensure the strike plate on the tub frame is not bent.

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Problem: Water Inlet Error. The unit did not reach the required water level after 10 minutes of filling.

How to Fix IE Error

1. Verify the home water supply valve is fully open and the line is not kinked.
2. Turn off water and power. Remove the water inlet hose from the valve and check the small mesh filter screen inside the valve for sediment.
3. Clean the screen with a toothbrush.
4. If water pressure is good and the screen is clean but water won’t enter, replace the Water Inlet Valve (located behind the kickplate).

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