KitchenAid Refrigerator Error Code SH

SH indicates that a thermistor or temperature sensor is reading above the maximum allowable limit, which the control board interprets as a short circuit condition. The sensor's resistance has dropped so low that the board sees it as an extreme high-temperature signal. This is typically caused by a failed thermistor or a short in the wiring harness connected to it. The refrigerator may still be cooling normally despite the error.

The SH code is a sensor fault, not necessarily a sign that the refrigerator is actually overheating. However, if the control board cannot get accurate temperature readings, it may not regulate cooling correctly, which could affect food safety over time. It is best to address the code promptly and monitor the actual compartment temperatures in the meantime.

Performing a reset by unplugging the refrigerator for a few minutes may temporarily clear the SH code, but it will return if the underlying short circuit has not been repaired. The code is triggered by an ongoing hardware condition, not a software glitch, so a reset alone is not a fix. The thermistor and its wiring must be inspected and repaired or replaced to resolve the fault permanently.

A knowledgeable DIYer can start by inspecting the thermistor wiring harnesses and connectors for visible damage, pinching, or corrosion. Using a multimeter to test thermistor resistance is the next step, and if the sensor reads near zero ohms, replacing it is a straightforward repair. If the wiring and sensor both test correctly, diagnosing a faulty control board typically requires more advanced tools and experience.

If only the thermistor needs replacement, repair costs including parts and labor typically range from $100 to $250 depending on the sensor location and local labor rates. If the wiring harness requires repair or replacement, costs can be slightly higher. A control board replacement, if needed, is the most expensive scenario and can range from $250 to $500 or more.