KitchenAid Refrigerator Error Code S6

The S6 code indicates that the Freezer Compartment (FC) temperature sensor has been detected as shorted or open by the main control board. This means the sensor's electrical circuit is reading outside the expected resistance range, which prevents the board from accurately monitoring freezer temperature. The cause is typically a failed thermistor, damaged wiring, or a corroded connector.

Continued use is risky for food safety. With the FC sensor faulted, the control board cannot reliably regulate freezer temperature, which could result in the freezer running too cold, not cold enough, or behaving erratically. It is best to address the fault promptly and transfer perishable items to an alternative freezer in the meantime.

A reset may temporarily clear the S6 code from the display, but the error will return if the underlying sensor or wiring fault has not been corrected. To clear the code permanently, the faulty component must be identified and repaired or replaced. Repeated resets without addressing the root cause will not restore proper freezer temperature control.

A knowledgeable DIYer can diagnose and resolve this error in many cases. Start by inspecting the wiring harness and connector leading to the FC sensor for visible damage or corrosion. If the wiring looks intact, test the thermistor's resistance with a multimeter and compare the reading to the expected value for the current freezer temperature. If the sensor is confirmed faulty, replacing the thermistor is a straightforward repair for someone comfortable working with appliance wiring.

If only the thermistor needs replacement, parts typically range from $15 to $50 depending on the specific model, and the repair is relatively inexpensive if done without a service call. A professional repair visit including labor can range from $100 to $250 or more depending on your location and whether the wiring or control board also needs attention.