Sub-Zero Refrigerator Error Code 10 F 01

Error code 10 F 01 means the control board has detected a shorted or closed condition in the freezer evaporator thermistor circuit. The evaporator thermistor is a temperature sensor located near the freezer coils that reports coil temperature to the board. When it shorts, its resistance drops to near zero, giving the board an invalid reading. This fault can affect defrost timing and overall temperature regulation in the freezer.

A shorted evaporator thermistor can compromise the control board's ability to properly manage defrost cycles and compressor operation, which may lead to temperature instability or excessive ice buildup over time. Food safety could be affected if freezer temperatures drift outside safe ranges. It is best to address the fault promptly rather than continuing to run the unit without repair.

A power reset may temporarily clear the displayed code, but if the thermistor or its wiring is actually shorted, the fault will return as soon as the control board runs its diagnostics again. Clearing the code without fixing the underlying problem does not restore proper sensor function. A lasting repair requires testing and replacing the faulty thermistor or correcting the wiring issue causing the short.

A knowledgeable DIYer with a multimeter can test the thermistor by disconnecting it from the harness and measuring resistance across its terminals. A shorted sensor will read near 0 ohms and needs to be replaced. However, accessing the freezer evaporator area may require removing interior panels, and reassembly must be done carefully to maintain proper sealing, so many homeowners prefer to have a qualified technician handle the repair.

Repair costs vary depending on whether only the thermistor needs replacement or if wiring or other components are also involved. A thermistor part alone typically costs in the range of $20 to $80. With professional labor, total repair costs commonly fall between $150 and $400, depending on your location and the technician's hourly rate.