Kenmore Refrigerator Error Code FS

The FS code on a Kenmore refrigerator indicates that the main control board has detected a short circuit or open circuit in the freezer temperature sensor circuit. This means the board is either receiving no signal or a signal that is out of the acceptable range from the freezer thermistor. The refrigerator may not regulate freezer temperatures correctly while this fault is active. Diagnosis starts with checking connector CON6 on the main PCB.

Running the refrigerator with an active FS code is not recommended for extended periods. Without accurate freezer temperature data, the control board cannot properly manage cooling cycles, which means food in the freezer may not be kept at a safe temperature. Check and address the fault as soon as possible to avoid potential food spoilage.

Repair costs depend on which component has failed. If the fix is simply reseating a loose connector, there may be no parts cost at all, with only a service call fee if a technician is involved, typically in the range of $75 to $150. Replacing a freezer thermistor is generally an inexpensive repair, with parts usually ranging from $15 to $50 plus labor. A main PCB replacement is the most costly scenario, with parts and labor potentially ranging from $200 to $450 or more depending on the specific model.

Start by inspecting the CON6 connector on the main PCB for a loose, corroded, or damaged connection and reseat it firmly. If that does not resolve the code, trace the freezer sensor wiring harness for any breaks or pinch points and test for continuity. If the wiring is intact, test the freezer thermistor resistance and replace it if it reads open or shorted. A failed main PCB is the last component to suspect if all other parts check out.

A power reset by unplugging the refrigerator for a few minutes may temporarily clear the FS code, but it will return if the underlying fault in the freezer sensor circuit has not been corrected. A reset is useful for confirming whether the fault is intermittent, such as a loose connection, but it is not a repair. The root cause must be identified and fixed to permanently clear the code.