LG Refrigerator Error Codes

Complete LG Fridge Troubleshooting Guide

ER FF
Freezer Fan Failure
  • Check freezer fan for ice blockage.
  • Inspect fan motor operation.
  • Defrost unit if ice buildup is present.
  • Replace fan motor if faulty.
ER IF
Ice Fan Error
  • Inspect ice fan for obstruction.
  • Check wiring connections.
  • Defrost ice compartment.
  • Replace fan if not spinning.
ER DH
Defrost Heater Fault
  • Check defrost heater continuity.
  • Inspect wiring harness.
  • Look for ice buildup on evaporator.
  • Replace heater if defective.
ER CO
Communication Error
  • Reset power for 5–10 minutes.
  • Check main PCB connections.
  • Inspect wiring between boards.
  • Call technician if persistent.
ER FS
Freezer Sensor Error
  • Check sensor wiring.
  • Inspect freezer temperature sensor.
  • Ensure proper connector seating.
  • Replace sensor if needed.
ER CF
Condenser Fan Error
  • Clean condenser fan area.
  • Check fan motor operation.
  • Remove dust buildup.
  • Replace fan if not working.
ER RS
Refrigerator Sensor Error
  • Inspect fridge temperature sensor.
  • Check wiring connections.
  • Restart unit.
  • Replace sensor if faulty.
ER DS
Damper Sensor Error
  • Check air damper movement.
  • Inspect sensor wiring.
  • Ensure no blockage in airflow.
  • Replace damper assembly if needed.
22 / 33
Compressor Fault (Model Dependent)
  • Check power supply stability.
  • Inspect compressor wiring.
  • Listen for abnormal compressor noise.
  • Call technician for diagnosis.
ER HS
Humidity Sensor Error
  • Inspect humidity sensor connection.
  • Clean sensor area.
  • Restart refrigerator.
  • Replace sensor if faulty.
ER TS
Temperature Sensor Failure
  • Check thermistor wiring.
  • Inspect sensor placement.
  • Reset power.
  • Replace sensor if needed.
ER IS
Ice Maker Sensor Error
  • Check ice maker wiring.
  • Inspect water supply line.
  • Reset ice maker module.
  • Replace sensor if faulty.
ER SS
Pantry Sensor Error
  • Check pantry drawer sensor.
  • Inspect wiring connections.
  • Ensure drawer alignment.
  • Replace sensor if needed.
ER RT
Room Temperature Sensor Error
  • Inspect ambient sensor.
  • Check wiring harness.
  • Restart unit.
  • Replace sensor if defective.
OFF
Demo Mode Enabled
  • Hold refrigerator settings buttons.
  • Disable demo mode in settings.
  • Unplug unit for reset.
  • Check user manual for model steps.
ER GF
Flow Sensor Issue
  • Check water inlet line.
  • Inspect flow sensor for blockage.
  • Clean water filter.
  • Replace sensor if needed.
Important: If the error continues after troubleshooting, disconnect power and contact an authorized LG service technician.