LG Refrigerator Error Code CF-SENSOR

The CF-SENSOR error means the main control board has detected a problem with the CF compartment temperature sensor. The sensor is reporting a value outside the valid range of -58°F to -122°F, which indicates a cut wire, short circuit, contact failure at a connector, or a missing sensor housing. The refrigerator flags this error to alert you that it cannot reliably monitor or regulate the temperature in that compartment.

With the CF-SENSOR error active, the refrigerator cannot accurately monitor the CF compartment temperature, which means food stored there may not be kept at a safe or consistent temperature. It is best to move temperature-sensitive items to another section of the refrigerator or a separate unit until the sensor issue is resolved. The error does not represent an electrical safety hazard to your home, but it does pose a food safety concern.

Repair costs vary depending on the cause. If the issue is simply a loose connector, there may be no parts cost at all, though a service call fee typically runs in the range of $75 to $150. If the sensor itself needs replacement, the part cost generally falls in the $20 to $60 range plus labor. Wiring harness repairs can add to the cost depending on the extent of the damage.

Some causes of this error, such as a loose or unseated connector, can be addressed without special tools by carefully reseating the connector at Main PCB CN 30 pins 5 and 7. However, diagnosing a cut wire, short circuit, or failed sensor requires a multimeter and comfort working around low-voltage electronics. If you are not confident with basic electrical testing, a qualified appliance technician is recommended to avoid further damage.

A power reset may temporarily clear the error display, but the code will return if the underlying fault in the wiring, connector, or sensor has not been repaired. Resetting is useful as a first step to confirm the error is active and persistent, but it is not a fix on its own. The root cause must be diagnosed and corrected to permanently resolve the error.