LG Refrigerator Error Code F2 F4

The F2 F4 code on an LG refrigerator indicates that the cooling compartment's BLDC fan motor has not sent a valid position signal to the control board for 65 or more seconds during operation. The control board uses this signal to confirm the fan is running. When the signal is absent, the system flags the fault to prevent operating the refrigerator in an unverified cooling state. The fridge will attempt to restart the fan every 30 minutes automatically.

The F2 F4 error means the cooling fan may not be running properly, which can lead to rising temperatures inside the refrigerator compartment. Perishable food can spoil if the fan is not circulating cold air. It is advisable to check the internal temperature with a thermometer and avoid relying on the refrigerator for temperature-sensitive items until the fault is resolved.

Repair costs depend on the root cause. If the issue is ice buildup requiring only a defrost, there may be no parts cost. A replacement BLDC fan motor typically ranges from $30 to $100 for the part, while a main control board can cost between $100 and $300 or more. Adding professional labor, total repair costs generally range from $100 to $400 depending on the component replaced and the technician's rates in your area.

Some causes of the F2 F4 error are DIY-friendly. If ice buildup is blocking the fan, manually defrosting the freezer and refrigerator compartments may resolve the issue. Checking and reseating the wiring harness connector at the fan motor is also something a careful DIYer can attempt. However, replacing the fan motor or the main control board requires comfort working with appliance wiring and is best handled by a qualified technician if you are not experienced.

The LG control board (MICOM) is designed to reset automatically if the fan motor returns to normal operation during one of its 30-minute retry cycles. A manual power reset by unplugging the refrigerator for a few minutes may also clear the code temporarily. However, if the underlying problem with the fan motor, wiring, or control board is not corrected, the error will return.