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LG Refrigerator Error Code FF (Freezer Fan Error)

FF means LG’s freezer fan isn’t turning the way it should, usually because frost has built up around the fan motor.

Risk: Low

Meaning

FF (sometimes shown as Er FF) means LG’s freezer fan isn’t turning correctly, and frost buildup around the fan motor is the cause LG documents most often. A quick power reset clears it sometimes, but if FF keeps coming back, LG’s fix is a full manual defrost: unplug the unit, clear out the food and ice, and leave the doors open for at least 8 hours so the frost around the fan can fully melt before you plug it back in.

The information provided here is a diagnostic aid and does not replace the intervention of a qualified professional.

Possible causes

No cause is certain until it has been checked on the appliance.

Very likely Frost buildup around the freezer fan motor blocking the blade
Likely A door gasket not sealing fully, letting warm air in and building frost faster than normal
Possible Fan motor failure

Tools needed

Towels
Cooler with ice
Thermometer
Flashlight
Hair dryer (optional)

First checks

Reset power first: unplug the refrigerator or trip its breaker, wait about 5 minutes, then restore power.
If FF comes back, defrost manually: unplug the unit, remove food and ice, and leave the doors open for at least 8 hours with towels down to catch the melt.
After defrosting, dry the interior, plug back in, and give it 24 to 48 hours to return to normal temperature before judging whether it worked.
Check that vents inside aren't blocked and that both doors close completely and sit level.

Step-by-step diagnosis

Cut power for about 5 minutes, then restore it. If FF clears and stays clear, it was transient.
If it returns, commit to a full defrost. Move the food to a cooler, unplug, and leave both doors open for at least 8 hours with towels down.
Do not chip at the ice with a knife or screwdriver. Puncturing an evaporator tube ends the repair and the refrigerator with it.
A hair dryer on its low setting speeds things up, as long as you keep it moving and away from the plastic liner.
Once the ice is gone, dry everything and check the freezer fan cover for cracked plastic or a blade that catches as you turn it by hand.
Check both gaskets, and check the unit sits level so the doors swing shut on their own.
Plug back in and allow 24 to 48 hours to reach temperature before judging the result.

What not to do

Restarting the fridge repeatedly without ever doing the full defrost. A quick power cycle only clears frost that hasn't built up much yet.
Skipping the towel prep before an 8-hour defrost. The melt is more water than most people expect.

When to stop

FF returns within days of a full defrost. Frost rebuilding that fast points at the defrost heater or its thermostat, not the fan.
The fan grinds, or will not turn freely once the ice has gone.

An error code varies by brand

The same code can have a different meaning depending on the brand and model. Always check your appliance's manual before acting.

Related guides

When to call a professional

If the simple checks turned up nothing, if the repair involves electricity, gas, or the sealed refrigerant system, or if you have any doubt at all: stop there and hand the appliance over to a qualified technician.