LG Refrigerator Error Codes
LG refrigerators show an Er code (or flashing temperature digits) when a sensor or fan fault occurs. Here's what each means.
Er FF
Means: Freezer fan fault — the evaporator fan isn't turning freely.
Fix: Check for ice buildup around the fan from a defrost problem; the fan motor may need replacing if it's seized.
Er dH
Means: Defrost heater / long defrost fault.
Fix: The defrost heater or sensor has failed, letting frost build up. This usually needs a technician to test the defrost circuit.
Er IF
Means: Ice-maker fan fault.
Fix: Ice may be blocking the ice-room fan. Defrost the ice compartment; replace the fan if it stays faulty.
Er CO
Means: Communication error between the main and display boards.
Fix: Power down for 5 minutes to reset. If it repeats, a wiring harness or board connection is loose.
Er rF
Means: Refrigerator (fresh-food) fan fault.
Fix: Check for ice or obstruction at the fresh-food fan; a failed fan motor needs replacement.
Er FS
Means: Freezer sensor fault.
Fix: The freezer thermistor is open or shorted and should be replaced.
FAQ
How do I reset an LG refrigerator?
Unplug it or switch off its breaker for about 5 minutes, then restore power. This clears temporary Er codes and lets the boards re-sync.
What does Er FF mean on an LG fridge?
Er FF is a freezer-fan fault, most often caused by ice jamming the evaporator fan after a defrost failure. Manually defrost the freezer; if the fan still won't spin, the motor needs replacing.