Sub-Zero Refrigerator Error Code 35 1 00

Error code 35 1 00 indicates that the control board has detected an open circuit in the Zone 1 evaporator fan circuit. This means the electrical path to the fan motor is broken and the fan is not operating. As a result, cold air may not circulate properly in the refrigerator compartment. The fault requires inspection of the fan motor and its wiring to locate the source of the open circuit.

Continuing to run the refrigerator with this fault active is not recommended for extended periods. Without the Zone 1 evaporator fan circulating air, the refrigerator compartment will not maintain safe food storage temperatures. Food spoilage is a real risk, and the compressor may also work harder than normal. Addressing the fault promptly is the safest course of action.

Resetting the refrigerator may temporarily clear the displayed code, but it will return if the underlying open circuit condition in the fan circuit has not been resolved. A reset does not repair a failed fan motor, broken wire, or faulty control board. The fault code will reappear once the control board cycles through its diagnostics and detects the open circuit again.

A knowledgeable DIYer can start by checking for any visibly loose or disconnected wiring connectors at the evaporator fan and reseating them, which sometimes resolves the fault. However, if the fan motor itself has failed or wiring is damaged inside the unit, replacing components in a Sub-Zero refrigerator can be complex and may be better handled by a certified technician. Testing motor windings and control board outputs requires a multimeter and some familiarity with refrigerator electrical systems.

Repair costs vary depending on the root cause. If only a wiring connector needs to be reseated, a service call fee may be the primary expense, typically in the range of $100 to $200. A replacement evaporator fan motor generally costs between $50 and $200 for the part, plus labor. If the control board is at fault, board replacement on Sub-Zero units can range from $300 to $700 or more including parts and labor.