LG error code FF: The freezer evaporator fan motor is not running at the expected speed. This is one of the most common LG refrigerator fault codes. Without the evaporator fan, cold air cannot circulate and both compartments will warm up.
The freezer evaporator fan motor is not running at the expected speed. This is one of the most common LG refrigerator fault codes. Without the evaporator fan, cold air cannot circulate and both compartments will warm up.
Unplug the refrigerator. Remove all food to coolers. Leave the freezer door propped open for 24–48 hours. Heavy frost buildup around the fan is the number one cause of this error — ice physically blocks the fan blades.
Tools needed: Towels
Once the freezer is fully defrosted, plug the refrigerator back in and open the freezer. Listen for the fan to start within 2–3 minutes. If it hums but doesn't spin, there may still be ice around the motor shaft or a mechanical jam.
Disconnect power. Remove the freezer contents and the rear panel inside the freezer (typically held by 4–6 screws). The evaporator fan motor is located behind this panel. Check that the fan blade spins freely by hand.
Tools needed: Screwdriver set, Nut driver
Disconnect the motor's wiring connector. Test the motor windings for continuity with a multimeter. If the motor reads open (infinite Ω) or significantly out of spec, the motor is burned out and needs replacement.
Tools needed: Multimeter
If the fan motor tests good but still doesn't run, the relay on the main control board that powers the fan may have failed. This requires checking voltage output at the motor connector when the compressor is running.
Tools needed: Multimeter
Manually defrost the freezer first (unplug 24–48 hours). Most FF errors are caused by ice-blocked fans, not a dead motor. If the fan resumes post-defrost but the error returns, the defrost heater or thermostat has failed.