Whirlpool Freezer Error Code SH

The SH code means the control board has detected a short circuit on the thermistor circuit, with a resistance reading below 1600 ohms. The thermistor is the temperature sensor the freezer uses to regulate its internal temperature. This code indicates the sensor, its wiring, or the connector has a fault that is producing an invalid resistance reading. The freezer cannot reliably control temperature until the issue is resolved.

Operating the freezer with an active SH code is not recommended for extended periods. Because the control board cannot get a valid temperature reading, it may not cycle the compressor correctly, which could lead to temperatures that are too warm to safely store food. It is best to address the fault promptly or transfer frozen items to another unit while diagnosing the problem.

Repair costs vary depending on the root cause. A replacement thermistor typically costs between $15 and $50 for the part alone, making it one of the more affordable fixes. If the control board is at fault, part costs can range from $80 to $200 or more. Adding professional labor generally brings the total cost of repair into the $100 to $300 range depending on the component replaced and local service rates.

Many homeowners and DIYers can address this fault by inspecting the thermistor wiring harness and connectors for visible damage after unplugging the freezer. If the wiring looks intact, measuring the thermistor resistance with a multimeter and comparing it to the diagram values will confirm whether the sensor has failed. Replacing a thermistor is a relatively straightforward repair if you are comfortable with basic appliance disassembly and electrical testing.

Unplugging the freezer and restoring power may temporarily clear the display, but the SH code will return if the underlying fault with the thermistor circuit is still present. A reset does not repair a shorted sensor or damaged wiring. The code will continue to appear until the resistance in the thermistor circuit reads above 1600 ohms under normal conditions.