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

This error code means the refrigerator's control board has detected an abnormal electrical condition in the RC evaporator temperature sensor circuit. The sensor, which is a thermistor that changes resistance with temperature, is reading either a near-zero resistance (short) or an unmeasurably high resistance (open circuit). Both conditions prevent accurate evaporator temperature monitoring and can affect cooling and defrost performance. The sensor itself, its connector, or the wiring harness are the most likely sources of the fault.

The refrigerator may continue to run with this fault active, but it cannot properly regulate the evaporator temperature, which can lead to inconsistent cooling or inadequate defrost cycles. Over time, this may result in frost buildup on the evaporator coils or food not being kept at safe temperatures. It is advisable to address the fault promptly rather than continue using the appliance indefinitely in this state.

If only the RC evaporator thermistor needs replacement, parts typically cost in the range of $15 to $60 depending on the specific model, and a DIY repair can be completed with basic tools. If a professional technician is needed, expect a combined parts and labor cost in the range of $100 to $250 for a straightforward sensor replacement. Costs can be higher if the wiring harness requires repair or if the control board is ultimately found to be at fault.

A knowledgeable DIYer with a multimeter can diagnose this fault by accessing the evaporator compartment, disconnecting the RC sensor, and measuring its resistance to determine if the sensor or wiring is at fault. If the sensor has failed, replacing it is a straightforward repair involving unplugging the old sensor and installing a compatible replacement. However, if the wiring harness or control board is involved, the repair becomes more complex and may warrant professional service.

Power cycling the refrigerator may temporarily clear the error code from the display, but the fault will return if the underlying sensor or wiring issue has not been corrected. A reset does not repair a failed thermistor, corroded connector, or broken wire. The code should be treated as an indication of an active hardware fault that requires physical inspection and repair.