Whirlpool Freezer Error Code 01

Error code 01 on a Whirlpool freezer activates the RC thermistor diagnostic display, showing the current temperature reading from that sensor in Fahrenheit or Celsius. If the sensor circuit has an open circuit, the display will show 'OP', and if there is a short circuit, it will show 'SH'. This code points to a problem with the temperature sensor or its associated wiring. Diagnosing it requires checking connectors and testing thermistor resistance with power disconnected.

If the display shows an 'OP' or 'SH' condition, the control board is not receiving accurate temperature data, which means the freezer may not maintain safe storage temperatures. It is best to address the fault promptly and check that food is being stored at the correct temperature using an independent thermometer in the meantime. Continued use with a faulty thermistor risks food spoilage.

If only a thermistor replacement is needed, parts typically range from around $15 to $60 depending on the specific model, with labor costs adding $75 to $150 or more if a technician performs the repair. If the issue is a wiring harness or control board, costs can be higher, potentially ranging from $150 to $400 or more for parts and labor combined. Getting a diagnostic service call will help confirm exactly which component needs to be replaced before committing to a repair.

A knowledgeable DIYer can perform the initial diagnostic steps, including inspecting the wiring harness and connectors for visible damage or corrosion. If resistance testing with a multimeter confirms the thermistor is out of spec, replacing the sensor is a straightforward repair on most models. However, if the wiring or control board is involved, professional service is recommended to avoid further damage.

Unplugging the freezer and restoring power may temporarily clear the display, but if the underlying wiring fault or thermistor failure is still present, the code or abnormal reading will return. A reset does not repair a failed sensor or damaged connector. The root cause must be diagnosed and corrected for the code to clear permanently.