KitchenAid Refrigerator Error Code SH + FC evaporator sensor shorted or open

This code means the refrigerator's control board has detected that the freezer compartment evaporator temperature sensor is either shorted or has an open circuit. The sensor, which is a thermistor, is expected to produce a specific resistance value corresponding to the evaporator temperature. When the reading falls outside the valid range in either direction, the board logs this fault code. It typically points to a failed sensor, damaged wiring, or a corroded connector.

Short-term use may be possible, but the refrigerator's ability to regulate freezer temperature accurately is compromised with this sensor fault active. The control board may not properly execute defrost cycles or compressor control without valid evaporator temperature data. It is best to address the fault promptly to avoid food spoilage or secondary damage such as excessive frost buildup on the evaporator coils.

If the FC evaporator thermistor itself has failed, the part typically costs in the range of $15 to $50, and a service technician's labor to diagnose and replace it generally brings the total repair cost to somewhere between $100 and $250 depending on your location. If the fault extends to the wiring harness or the control board, costs can be higher, with control board replacements potentially ranging from $200 to $400 or more including labor.

A knowledgeable DIYer can address this fault by inspecting the sensor wiring harness and connector for visible damage or corrosion and by testing the thermistor's resistance with a multimeter. If the sensor has failed, replacing the FC evaporator thermistor is a relatively straightforward repair that involves accessing the freezer evaporator compartment and unplugging the old sensor. However, if the control board is the source of the fault, professional diagnosis is recommended.

Performing a power reset by unplugging the refrigerator for a few minutes may temporarily clear the code from the display, but it will return if the underlying sensor fault still exists. A reset does not repair a failed thermistor, broken wire, or corroded connector. The code will persist or reappear until the faulty component is identified and replaced.