Sub-Zero Refrigerator Error Code 10 r 01

Error code 10 r 01 indicates that the refrigerator compartment evaporator thermistor has been detected in a shorted or closed condition. The evaporator thermistor monitors the temperature of the cooling coils inside the refrigerator section and reports that data to the control board. A shorted thermistor produces a near-zero resistance reading, which the board recognizes as an invalid signal and flags with this code. The fault points to the thermistor itself, its wiring harness, or its connector.

A shorted evaporator thermistor can disrupt the control board's ability to manage defrost cycles and compressor operation accurately, which may cause the refrigerator section to run at incorrect temperatures. Food safety can be compromised if the compartment becomes too warm or too cold without proper regulation. It is advisable to monitor internal temperatures closely with a thermometer and address the fault promptly rather than continuing normal use.

Repair costs vary depending on whether the issue is a failed thermistor, damaged wiring, or a control board problem. A thermistor replacement is generally the least expensive repair, with parts and labor typically ranging from around $150 to $350 depending on your location and service rates. If wiring repairs or a control board replacement are needed, costs can be significantly higher, potentially ranging from $300 to $700 or more for a full diagnosis and repair on a Sub-Zero unit.

A knowledgeable DIYer can perform basic diagnostics such as inspecting the thermistor wiring for visible damage, checking the connector for moisture or corrosion, and testing the thermistor resistance with a multimeter. If the thermistor reads near-zero ohms, replacing the sensor is the likely fix. However, accessing the evaporator compartment on Sub-Zero units often requires removing interior panels, and some technicians recommend professional service to avoid damaging sealed components.

A power reset may temporarily clear the error from the display, but the code will return if the underlying fault in the thermistor or its wiring has not been corrected. Resetting the unit without repairing the cause does not fix the shorted sensor condition. The error should be diagnosed and the faulty component repaired or replaced before expecting the code to stay cleared.