LG Refrigerator Error Code F-sensor short

The F-sensor short code means the freezer compartment temperature sensor has been detected in a short circuit condition. The control board reads the sensor resistance as corresponding to a temperature above +50°C, which is not a realistic freezer reading. This tells the board the sensor is faulty rather than the freezer actually being that hot. The refrigerator cannot accurately regulate freezer temperature until the sensor or its wiring is repaired.

You should not rely on the freezer operating normally while this error is active, because the control board cannot accurately read or regulate freezer temperature without a functioning sensor. Food safety may be compromised if the freezer temperature is not being properly controlled. It is best to address the fault promptly and check that the freezer is maintaining a safe temperature in the meantime.

Resetting the refrigerator by unplugging it for a few minutes may temporarily clear the error code from the display, but the fault will return if the underlying sensor or wiring problem has not been corrected. A reset does not repair a shorted sensor or damaged wiring. The error will reappear once the control board polls the sensor again and detects the same abnormal resistance reading.

A knowledgeable DIYer can perform this repair by first unplugging the refrigerator, locating the F-sensor in the freezer compartment, and checking the sensor resistance and wiring with a multimeter. If the sensor reads near-zero resistance or the wiring shows a short, replacing the sensor is straightforward and requires basic tools. However, if the fault is in the main control board wiring or the board itself, professional service is recommended.

If only the F-sensor needs replacement, parts typically cost in the range of $15 to $50 depending on the specific model. If a technician performs the repair, total costs including labor generally range from $100 to $200. Wiring harness repairs or control board replacement would increase the cost beyond that range.