Maytag Range Error Code F4

The F4 code means the control board detected resistance in the oven temperature sensor circuit that dropped below 500 ohms, indicating a short in the sensor wire harness or a failed sensor probe. The control board monitors sensor resistance to regulate oven temperature, and this reading is too low to be a valid signal. The oven will not heat normally while this code is active.

No, you should not use the oven while F4 is active. The control board cannot accurately monitor oven temperature with a shorted sensor circuit, which means the oven could overheat without the control board being able to respond correctly. The oven bake and broil functions will likely be disabled anyway until the fault is cleared. Surface burners on a gas range may still function, but resolve the sensor issue before using the oven.

Unplug the range before testing. Locate the sensor probe mounted on the back interior wall of the oven cavity and disconnect its harness connector. Set a multimeter to measure resistance (ohms) and touch the probes to the two sensor terminals. At room temperature, a functional Maytag oven sensor reads approximately 1080 ohms. A reading well below 500 ohms confirms the sensor has failed and needs replacement. If the sensor reads normal, the short is in the wiring harness between the sensor and the control board.

Start by unplugging the range and inspecting the sensor wire harness for any pinched, burned, or bare wires. Then disconnect the oven temperature sensor and measure its resistance with a multimeter at room temperature. A good sensor reads around 1080 ohms. If the sensor reads below 500 ohms or open, replace the sensor. If the sensor tests normal, inspect the harness connectors for damage and trace the wiring back to the control board for any short.

If the oven temperature sensor is the cause, replacement sensors typically cost between $20 and $60 for the part, and replacing it is a manageable DIY repair requiring only a screwdriver and multimeter. A new sensor wire harness runs roughly $30 to $80 depending on the model. If a professional technician is needed, expect a service call fee plus one hour of labor, which can bring the total to $150 to $250 or more. A failed control board is the most expensive scenario, with parts alone ranging from $100 to $300.