Access our premium database of error codes, common faults, and professional repair solutions for LG appliances.
LG PS: Operational cycle fault detected during Tumble Dryer program execution.
Component fatigue, sensor feedback out of tolerance, wiring harness connector discontinuity, or electronic control board glitch.
Check electric outlet or power cord connections. PRO TIP: 'Flow Sense' or restricted airflow errors mean you must clean the vent — this is the #1 fire hazard.
Refrigerator Sensor 2 problem (lower part) / Refrigerator side temperature detection problem
Refrigerator sensor disconnection or short circuit.
Unplug the appliance and wait for 20 seconds. Restart the appliance. Check if the connector at the PCB or inside the refrigerator is removed or loose, re-insert. Check if the connector measures out of 6 ~ 300 kilo-ohm range (normal is 13 kilo-ohm at 20 degrees Celsius). Replace the assemblies if the problem is not solved.
Refrigerator fan Failure / Refrigerator fan disconnection, defective PCB, or blockage.
A refrigerator fan disconnection, a defective Main PCB or a refrigerator fan blockage. The appliance has encountered a problem with the fan in the refrigerator.
Unplug the appliance and wait for 20 seconds, then restart. Check if the connector at the PCB or machine room is removed or loose --> re-insert. Check if the connector measures 7 ~ 16 VDC between Black and Red Connections or 1 ~ 4 VDC between Purple and Red Connections. Replace the assemblies if the problem is not solved.
Refrigerator Sensor problem (upper part) / Refrigerator side temperature detection problem
Refrigerator sensor disconnection or short circuit.
Unplug the appliance and wait for 20 seconds. Restart the appliance. Check if the connector at the PCB or inside the refrigerator is removed or loose, re-insert. Check if the connector measures out of 6 ~ 300 kilo-ohm range (normal is 13 kilo-ohm at 20 degrees Celsius). Replace the assemblies if the problem is not solved.
Room temperature sensor problem / Ambient temperature detection problem / Failure of Outside Sensor (displayed as 'Er' on the outside temperature display part).
A room temperature sensor disconnection or short circuit / Snapping or short-circuit of outside temperature perceiving sensor.
1. Unplug the appliance and wait for 20 seconds. 2. Restart the appliance. Repair Instructions: Check if the connector at the PCB or at the hinge is removed or loose (re-insert). Check if the connector measures out of 5 ~ 400 kilo-ohm range (normal is 13 kilo-ohm at 20 degrees Celsius). Replace the assemblies if the problem is not solved.
LG RU: Operational cycle fault detected during Refrigerator / Freezer program execution.
Component fatigue, sensor feedback out of tolerance, wiring harness connector discontinuity, or electronic control board glitch.
1. Disconnect 230V mains power for 3 minutes. 2. Inspect wire harness and edge connectors on control board for loose pins or oxidation. 3. Inspect mechanical linkages and sensors associated with subsystem. 4. Reset: Press Power to turn off. Unplug mains cable for 5 minutes. Press and hold Start/Pause for 10 seconds to discharge board capacitors, then restart.
Abnormal Water-Tank Sensor
Water-Tank Sensor short&open circuit.
Unplug the appliance and wait for 20 seconds. Restart the appliance. Check connections, replace assemblies if problem not solved.
LG TE: NTC temperature sensor signal out of range (open or short circuit) in Tumble Dryer.
Temperature sensor out of service, MAIN PWB ASSEMBLY faulty, HEATER ASSEMBLY faulty.
Test temperature sensor. PRO TIP: 'Flow Sense' or restricted airflow errors mean you must clean the vent — this is the #1 fire hazard.
LG UE: Operational cycle fault detected during Washing Machine program execution.
Laundry poorly distributed during spinning, tachymetry, electronic board, or tub movement detection system.
Redistribute clothing evenly in the drum. PRO TIP: We see more clogged pump filters than any other single issue. Takes 5 minutes to clean and saves a $149 service call.
Ambient Sensor Error is displayed.
Loose connection (CON6), defective R-sensor (Ambient sensor), defective main PCB.
Reconnect CON6. If the same situation appears, disconnect CON6 and measure resistance (Pin7 & Pin8 of CON6, WH to WH, 6 ~ 400 Result). If abnormal, replace R-sensor. If the same situation appears again, replace the main PCB.
Communication Error is displayed.
Loose connection (Display PCB, Hinge, CON6), defective Display PCB, defective Main PCB.
Reconnect Display PCB, Hinge, and CON6. Check output voltages (Display PCB: pin3 & pin5 of CON101, 0 ~ 5V; pin4 & pin5 of CON101, 0 ~ 5V. Receiver/Transmitter: pin4 & pin5 of CON6, 0 ~ 5V). Replace Display PCB or Main PCB.
Condenser Fan Error is displayed and the condenser fan does not rotate.
Loose connection (CON7), defective fan motor (connector, locked, mouse), defective main PCB.
Reconnect CON7. Reset and Enter TEST 1 MODE (check output voltage between pin7 and pin8 of CON7, 12 ~ 16 V). Check feedback voltage (pin8 and pin9 of CON7, 1 ~ 4 V). If abnormal, check fan motor, replace Main PCB.
Freezer Defrost Heater Error is displayed.
Loose connection (CON3), relay operation issue, open or short of Fuse-M, defective heater, defective DEF-sensor, gasket not stuck or high temperature loads (hot foods) in product, defective main PCB.
Reconnect CON3. Enter TEST 2 MODE and check voltage (between pins 6(BL/WH) and 5(BN) of CON3, 230 V AC). Enter TEST 1 MODE and check voltage (0 V AC). If abnormal, replace Main PCB. Also check resistance of Fuse-M, heater and DEF-sensor.
Freezer Defrost Sensor Error is displayed.
Loose connection (CON7), defective D-Sensor, defective main PCB.
Reconnect CON7. If the same situation appears, disconnect CON7 and measure resistance (Pin3 & Pin4 of CON7, BO to BO, 6 ~ 300 Result). If abnormal, replace D-Sensor. If the same situation appears again, replace the main PCB.
Freezer Fan Error is displayed and cold air does not come out of the top of the main duct.
Loose connection (CON7), defective fan motor (connector, frozen, locked), defective main PCB.
Reconnect CON7. Reset and Enter TEST 1 MODE (check output voltage between pin11 and pin12 of CON7, 12 ~ 16 V). Check feedback voltage (pin10 and pin11 of CON7, 1 ~ 4 V). If abnormal, check fan motor, replace Main PCB.
Freezer Sensor Error is displayed.
Loose connection (CON7), defective F-sensor, defective main PCB.
Reconnect CON7. If the same situation appears, disconnect CON7 and measure resistance (Pin1 & Pin2 of CON7, GY to GY, 1.4 ~ 120 Result). If abnormal, replace F-sensor. If the same situation appears again, replace the main PCB.
Ice Maker KIT Error is displayed.
Loose connection (CON13), defective Ice Maker module part in freezer room, defective main PCB.
Reconnect CON13. Inspect Ice Maker module part. Check voltage (between pins 9 and 10 of CON13, 5V ~ 12V). If abnormal, replace Ice Maker Unit. If the same situation appears again, replace the Main PCB.
Ice maker Sensor Error is displayed.
Loose connection (CON13), defective I/Maker (ice maker) sensor, defective I/Maker unit, defective main PCB.
Reconnect CON13. If the same situation appears, disconnect CON13 and measure resistance (Pin1 & Pin2 of CON13, GY to GY, 6 ~ 150 Result). If abnormal, replace I/Maker. If the same situation appears again, replace the main PCB.
Service guide LED blinking 1 time repeatedly.
Component fatigue, sensor feedback out of tolerance, wiring harness connector discontinuity, or electronic control board glitch.
Reset the power and check normal operation. If the same symptom occurs again, replace the PCB.
Service guide LED blinking 2 time repeatedly.
PCB part defect (Piston over-operation).
Reset the power and check normal operation. If the same symptom occurs again, replace the PCB.
Service guide LED blinking 3 time repeatedly.
Component fatigue, sensor feedback out of tolerance, wiring harness connector discontinuity, or electronic control board glitch.
Check input power. Reset the power and check normal operation. If the same symptom occurs again, replace the PCB.
Service guide LED blinking 4 time repeatedly.
COMP cable contact error.
Check connected condition between PCB and COMP. If there is no issue, replace the PCB.
Service guide LED blinking 5 time repeatedly.
Defective PTC Heater Pellet / Pulse Solenoid / Microswitch Contacts, open/short circuit in the wiring harness, or faulty connector on the door lock mechanism & safety interlock.
Reset the power and check normal operation. If the same symptom occurs again, replace the PCB. If the same symptom occurs again after taking action for PCB replacement, replace the COMP component.
Service guide LED blinking 6 time repeatedly.
Circuit over-current error.
Reset the power and check normal operation. If the same symptom occurs again, replace the PCB. If the same symptom occurs again after taking action for PCB replacement, replace the COMP component.
Service guide LED blinking 7 time repeatedly.
Component fatigue, sensor feedback out of tolerance, wiring harness connector discontinuity, or electronic control board glitch.
Reset the power and check normal operation. If the same symptom occurs again, replace the PCB.
Service guide LED blinking 8 time repeatedly.
Component fatigue, sensor feedback out of tolerance, wiring harness connector discontinuity, or electronic control board glitch.
Reset the power and check normal operation. If the same symptom occurs again, replace the PCB.
Voltage interruption during configuration.
Component fatigue, sensor feedback out of tolerance, wiring harness connector discontinuity, or electronic control board glitch.
1. Disconnect 230V mains power for 3 minutes. 2. Inspect wire harness and edge connectors on control board for loose pins or oxidation. 3. Inspect mechanical linkages and sensors associated with subsystem. 4. Reset: Press Power to turn off. Unplug mains cable for 5 minutes. Press and hold Start/Pause for 10 seconds to discharge board capacitors, then restart.
Refrigerator Defrost Heater Error is displayed.
Loose connection (CON4), relay operation issue, open or short of Fuse-M, defective heater, defective DEF-sensor, gasket not stuck or high temperature loads (hot foods) in product, defective main PCB.
Reconnect CON4. Enter TEST 2 MODE and check voltage (between pins 5(BL) and 3(BN) of CON4, 230 V AC). Enter TEST 1 MODE and check voltage (0 V AC). If abnormal, replace Main PCB. Also check resistance of Fuse-M, heater and DEF-sensor.
Refrigerator Defrost Sensor Error is displayed.
Loose connection (CON8), defective D-Sensor, defective main PCB.
Reconnect CON8. If the same situation appears, disconnect CON8 and measure resistance (Pin7 & Pin8 of CON8, BO to BO, 6 ~ 300 Result). If abnormal, replace D-Sensor. If the same situation appears again, replace the main PCB.
Refrigerator Fan Error is displayed and cold air does not come out of the top of the main duct.
Loose connection (CON12), defective fan motor (connector, frozen, locked), defective main PCB.
Reconnect CON12. Reset and Enter TEST 1 MODE (check output voltage between pin2 and pin3 of CON12, 12 ~ 16 V). Check feedback voltage (pin1 and pin2 of CON12, 1 ~ 4 V). If abnormal, check fan motor, replace Main PCB.
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