Sub-Zero Refrigerator Error Code 10 F 00

Error code 10 F 00 means the control board is detecting an open circuit on the freezer evaporator thermistor. The thermistor is a temperature sensor mounted near the freezer evaporator coil, and an open circuit means the board is receiving no resistance signal from it at all. This prevents the appliance from accurately managing freezer cooling and defrost timing. The fault points to either a failed thermistor, broken wiring, or a bad connector in that circuit.

With this fault active, the control board cannot rely on accurate evaporator temperature data, which can compromise defrost cycle timing and overall cooling performance. Food safety may be at risk if the freezer temperature is not being properly maintained. It is advisable to check actual freezer temperatures with a separate thermometer and limit use until the fault is resolved.

Resetting the unit may temporarily clear the displayed code, but the error will return as soon as the control board checks the thermistor circuit again and finds the open condition still present. The underlying fault, whether a failed thermistor, broken wire, or bad connector, must be physically diagnosed and repaired before the code will stay cleared. Do not rely on a reset as a fix for this error.

A knowledgeable DIYer can begin by testing the thermistor using the ice water resistance method, checking for 30,000 to 33,000 ohms at 0°C. If the thermistor tests out of range or reads open, replacing it is a straightforward repair that involves accessing the freezer evaporator compartment and swapping the sensor. Wiring and connector inspection can also be done without special tools. However, if the fault traces back to the control board, professional service is recommended.

If the repair only requires a new evaporator thermistor, parts typically cost in the range of $20 to $60 depending on the specific model. If professional labor is involved, total repair costs generally fall between $150 and $400 when combining parts and service time. Repairs that require control board replacement will be more expensive, often ranging from $400 to $800 or higher for Sub-Zero units.