Daewoo Refrigerator Error Code F2

The F2 code means the control board has detected a short circuit in the freezer temperature sensor circuit. Specifically, the voltage at the sensor input port on the micom controller has dropped below 0.2V, which falls outside the normal operating range. The fault could be in the sensor itself, the wiring, connector C3 on the main board, or components like diodes D02 and D04 or resistor R6 on the M-PCB.

It is not recommended to continue using the refrigerator normally with an active F2 fault. Because the freezer temperature sensor is reporting incorrectly, the control board cannot accurately regulate freezer temperatures. This can lead to improper cooling, food safety risks, or the compressor running outside its intended parameters.

A power reset may temporarily clear the F2 code from the display, but the error will return if the underlying short circuit condition is still present. The micom continuously monitors the sensor voltage, so as soon as it detects a reading below 0.2V at port 3 again, the F2 fault will reactivate. A permanent fix requires identifying and correcting the actual cause of the short circuit.

A knowledgeable DIYer can perform some of the diagnostic steps, such as inspecting and reseating connector C3, checking for visible wiring damage, and testing the freezer thermistor with a multimeter. However, testing and replacing surface-mount components like diodes D02 and D04 or resistor R6 on the M-PCB requires soldering skills and component-level board repair experience. Replacing the thermistor sensor is generally more accessible for a careful DIYer.

Repair costs vary depending on the root cause. Replacing a freezer thermistor sensor typically costs between $20 and $80 for the part, plus labor if a technician is hired. If the M-PCB requires component-level repair or full replacement, the cost can range from $80 to $250 or more depending on part availability and labor rates in your area.