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Error code reference

Maytag Range Error Code F4

Sensor resistance too low (below 500 ohms)

Maytag codesMaytag range codes

Sensor resistance too low (below 500 ohms) - possible short in sensor wire harness.

First step from the service manual

Check for a short in sensor wire harness and check sensor resistance.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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What F4 means on a Maytag range

The F4 error code on a Maytag range indicates the control board has detected resistance in the oven temperature sensor circuit that has dropped below 500 ohms. This falls outside the acceptable range for a functioning sensor and signals either a short circuit in the sensor wire harness or a failed sensor (RTD probe) itself. The control board continuously monitors sensor resistance to regulate oven temperature, and when it reads an abnormally low value, it triggers F4 and halts normal oven operation.

For homeowners, the oven temperature sensor is a small probe mounted inside the oven cavity, usually at the back wall. It tells the control board how hot the oven is. When this sensor or its wiring develops a short, the control board receives a false reading it cannot trust, so it shuts down to prevent overheating or other damage. You may notice the oven refusing to heat or displaying the code immediately after pressing start.

The most common physical causes are a pinched or burned wire harness where the sensor connects to the control board, or a sensor probe that has failed internally. Both conditions produce resistance readings below the 500-ohm threshold that triggers this code.

Source: manufacturer service documentation.

Common causes of F4

  1. 01

    Shorted sensor wire harness

    Part replacement

    The wiring harness connecting the oven temperature sensor to the control board can develop a short if wires are pinched, burned, or if insulation has worn through. A short pulls the resistance reading below 500 ohms, directly triggering F4.

  2. 02

    Failed oven temperature sensor (RTD probe)

    Part replacement

    The sensor probe itself can fail internally, causing its resistance to drop below the 500-ohm threshold. A properly functioning Maytag oven sensor reads approximately 1080 ohms at room temperature, so a reading well below 500 ohms indicates a defective sensor.

  3. 03

    Damaged sensor connector or terminal

    Wiring / connection

    Corrosion or heat damage at the connector where the sensor harness plugs into the control board or sensor can create a low-resistance path that mimics a short circuit. Inspecting and cleaning or replacing the connector may resolve the code.

  4. 04

    Faulty control board

    Part replacement

    In rare cases, the control board itself misreads the sensor circuit due to a failed input component on the board. This is the least likely cause and should only be suspected after verifying the sensor and harness test within normal resistance ranges.

See the test procedure for each cause

Frequently asked questions about F4

What does the F4 error code mean on a Maytag range?
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.
How do I fix the F4 error code on a Maytag range?
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.
Is it safe to use my Maytag range with an F4 error code?
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.
How much does it cost to fix an F4 error on a Maytag range?
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.
How do I test the oven temperature sensor to diagnose the F4 code on a Maytag range?
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.

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