LG bottom-freezer refrigerator error codes

LG

These error code explanations can help you diagnose a problem with your LG bottom-freezer refrigerator. For repair how-to help, visit the PartsDirect repair help section, which includes repair help for washing machines, other major appliances, lawn and garden equipment, garage door openers, vacuum cleaners and more. Search for your model number to find a complete list of replacement parts for your refrigerator.

Error Code
Condition
DIY advice
Er FS

Freezer sensor error

Check/Repair

Sensor and wiring connector problems.

Possible parts
Thermistor (temperature sensor), Wiring harness, Main power control board (PCB)
Er rS

Refrigerator sensor error

Check/Repair

Sensor, wiring and connectors.

Possible parts
Thermistor (temperature sensor), Wiring harness, Main power control board (PCB)
F dS

Freezer defrost sensor

Check/Repair

Sensor short or wiring problem.

How-to help
Possible parts
Controller assembly, which is a component that has the defrost thermistor (temperature sensor) and the fuse for the defrost system
r dS

Refrigerator defrost sensor

Check/Repair

Sensor short or wiring problem.

Possible parts
Controller assembly, which is a component that has the defrost thermistor (temperature sensor) and the fuse for the defrost system
Er HS

Humidity sensor

Check/Repair

Sensor short or wiring problem.

Possible parts
Humidity sensor
Er IS

Ice maker sensor

Check/Repair

Sensor short or wiring problem.

How-to help
Possible parts
Ice maker assembly; the sensor isn't usually sold separately
Er SS

Pantry sensor

Check/Repair

The pantry is the deli drawer. Short in sensor or wiring problem.

Possible parts
Pantry temperature sensor
Er rt

Room temperature sensor

Check/Repair

Short in sensor or wiring problem.

Possible parts
Room temperature sensor
Er It

System error inside ice maker

Check/Repair

Self-test ice maker routine.

Er gF

Flow meter error code

Check/Repair

Water pressure, flow of water.

Possible parts
Flow meter
F dH

Sensor did not get over 40 F in defrost

Check/Repair

Faulty fuse, heater or control board.

How-to help
Possible parts
Controller assembly, Defrost heater, Relay on control board
r dH

Sensor did not get over 40 F

Check/Repair

Faulty fuse, heater or control board.

Possible parts
Controller assembly, Defrost heater, Relay on control board
Er IF

The fan for the ice compartment failed

Check/Repair

Icing fan blocked, ice fan motor is defective, wiring in the circuit is defective, or the control board has failed.

How-to help
Possible parts
Ice fan motor, Wiring harness, Power control board (PCB)
Er FF

Evaporator fan failed

Check/Repair

Fan motor, control board or wiring harness.

Possible parts
Evaporator fan motor, Power control board, Wiring harness
Er CF

Condenser fan motor is defective

Check/Repair

Condenser fan motor, wiring or the control board.

Possible parts
Condenser fan motor, Power control board, Wiring harness
Er CO

Communication error

Check/Repair

Communication error between main board and display board.

How-to help
Possible parts
Display control board, Power control board, Wiring harness

Symptoms common to all refrigerators

Choose a symptom to see related refrigerator repairs.

Main causes: leaky door gasket, defrost system failure, evaporator fan not running, dirty condenser coils, condenser fan not running
Main causes: blocked air vents, compressor problems, condenser or evaporator fan not working, control system failure, sensor problems
Main causes: jammed ice cubes, broken ice maker assembly, dirty water filter, kinked water line, bad water valve, freezer not cold enough
Main causes: water valve leaking, frozen or broken defrost drain tube, overflowing drain pan, cracked water system tubing, leaking door seal
Things to do: clean condenser coils, replace the water filter, clean the interior, adjust doors to prevent air leaks, clean the drain pan
Main causes: damaged door seal, faulty defrost sensor or bi-metal thermostat, broken defrost heater, bad defrost timer or control board
Main causes: control board or cold control failure, broken compressor start relay, compressor motor failure, defrost timer problems
Main causes: blocked vents, defrost system problems, evaporator fan failure, dirty condenser coils, bad sensors, condenser fan not working

Repair guides common to all refrigerators

These step-by-step repair guides will help you safely fix what’s broken on your refrigerator.

How to replace a refrigerator temperature control board

If the temperature in your refrigerator doesn't match the temperature you set, the problem could be the temperature control board—a service technician can give you a definite diagnosis. If the board is at fault, follow these steps to replace it yourself.

Repair difficulty
Time required
 30 minutes or less
July 20, 2015
By Lyle Weischwill
How to clean refrigerator condenser coils

Help your refrigerator run more efficiently by cleaning the condenser coils. It's easy and takes just a few minutes.

Repair difficulty
Time required
 15 minutes or less
July 20, 2015
By Lyle Weischwill
How to replace a refrigerator water valve

Replace the water valve that feeds water to the ice maker and water dispenser if it no longer controls the flow of water.

Repair difficulty
Time required
 30 minutes or less

Articles and videos common to all refrigerators

Use the advice and tips in these articles and videos to get the most out of your refrigerator.

May 23, 2016

Diagnosing refrigerator thermistor problems video

By Sears PartsDirect staff

If your refrigerator isn't cooling at the right temperature, the problem could be the thermistor. Here's how to check.

January 27, 2016

How to purge air from a refrigerator water dispenser video

By Sears PartsDirect staff

Follow the steps in this video to remove air from the water line connected to your refrigerator's water dispenser so the water dispenses smoothly.

January 18, 2016

Troubleshooting an Er If error code on a refrigerator video

By Sears PartsDirect staff

Learn how to fix your refrigerator if it's displaying an Er If error code.