Maytag Range Error Code F1-1

F1-1 means the control board detected that the upper oven temperature exceeded 650°F while the oven door was in the unlocked position. This threshold is above any normal cooking temperature, so the control board shuts the oven down to prevent damage or a safety hazard. The code points to either a faulty upper oven temperature sensor reporting a false reading, or an actual overheating condition caused by a stuck heating element relay.

Start by disconnecting power to the range and checking the upper oven temperature sensor resistance with a multimeter, a functioning RTD sensor typically reads approximately 1,080 to 1,100 ohms at room temperature. If resistance is out of range, shorted, or open, replace the sensor. If the sensor tests good, inspect the wiring harness from the sensor to the control board for any signs of damage or shorting. If both test good, the control board relay controlling the bake or broil element is the likely cause and the board will need replacement.

Yes, this is the most common cause of F1-1. A shorted or failed RTD temperature sensor can transmit a false signal that the control board interprets as an upper oven temperature above 650°F, even when the actual oven interior is at a normal temperature or completely cold. Measuring the sensor resistance at the sensor connector with the oven unpowered is the fastest way to confirm or rule this out before condemning the control board.

No, you should not continue using the upper oven while F1-1 is active. The code indicates either a real overheating condition or a sensor fault serious enough that the control board cannot confirm safe operating temperatures. Either scenario presents a risk of further component damage or a fire hazard. Stop using the upper oven, disconnect power to the range, and diagnose the temperature sensor and control board before resuming use.

If the upper oven temperature sensor is the cause, parts typically run $20 to $60 and replacement is a DIY-accessible repair requiring only a screwdriver and a multimeter to confirm the diagnosis first. If the control board relay has failed, a replacement control board for a Maytag range generally costs $150 to $350 in parts, with professional labor adding $100 to $200 depending on your market. A wiring harness repair falls in the lower cost range if the damage is isolated, but full harness replacement can approach control board cost depending on the model.