Sub-Zero Refrigerator Error Code 10 r 00

Error code 10 r 00 means the control board has detected an open circuit in the refrigerator compartment evaporator thermistor. The thermistor is a temperature sensor located near the evaporator coil, and an open circuit means the board is receiving no usable signal from it. The correct resistance for this sensor is 30,000 to 33,000 ohms when tested in ice water at approximately 0 degrees Celsius. A reading outside that range or no reading at all confirms the circuit has failed.

Continued use with this fault active is not advisable for extended periods. Without a functioning evaporator thermistor, the control board cannot accurately manage defrost cycles or compressor operation in the refrigerator section, which can lead to temperature instability and potential food spoilage. Short-term use while waiting for a repair appointment is generally low risk, but you should monitor food temperatures closely with an independent thermometer.

A reset may temporarily clear the fault code from the display, but the code will return as soon as the control board re-checks the thermistor circuit and finds the same open circuit condition. Resetting does not address the underlying hardware failure in the sensor or wiring. The fault must be corrected by repairing or replacing the defective component before the code will clear permanently.

A knowledgeable DIYer can perform the initial thermistor resistance test using a multimeter and a cup of ice water. If the thermistor tests out of the 30,000 to 33,000 ohm range, replacing the sensor is a feasible repair for someone comfortable working inside a refrigerator evaporator compartment. However, if the wiring harness or connector is the cause, tracing and repairing the circuit requires more experience, and if the control board itself is involved, professional diagnosis is recommended.

If only the evaporator thermistor needs replacement, parts and labor typically fall in the range of $150 to $350 depending on your location and service provider. If the wiring harness requires repair or replacement, costs can rise to the $300 to $600 range. Sub-Zero appliances generally carry higher service costs than standard brands due to parts pricing and the specialized technician knowledge required.