Maytag Refrigerator Error Code OC

OC stands for open circuit and indicates that the control board detected a broken or absent electrical signal from the CZT (Convertible Zone Temperature) thermistor during the CZT test mode. This means the temperature sensor circuit for the convertible zone is not completing a proper electrical path. The refrigerator cannot accurately monitor or regulate that zone's temperature until the fault is resolved.

The OC code means the convertible zone thermistor is not functioning, so the temperature in that compartment may not be properly controlled. Food stored specifically in the convertible zone could be at risk if temperatures drift outside safe ranges. It is advisable to move perishables from that zone and arrange for service promptly.

A power reset may temporarily clear the OC code from the display, but the error will return if the underlying open circuit condition in the CZT thermistor circuit has not been corrected. Resetting without repairing is not a solution, as the root cause will continue to prevent proper temperature monitoring in the convertible zone.

Many cases of the OC error are caused by a loose or disconnected connector, which a knowledgeable DIYer can address by locating the CZT thermistor wiring and reseating the connections. If the wiring and connectors look intact, testing the thermistor with a multimeter for infinite resistance can confirm whether the sensor needs replacement. Wiring repairs or control board replacement are more involved and may warrant a professional technician.

Repair costs depend on the root cause. Reseating a loose connector costs nothing beyond your time. A replacement CZT thermistor typically runs in the range of $15 to $50 for the part. If a control board replacement is needed, parts and labor combined can range from $150 to $400 or more depending on your location and the service provider.