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Error code reference

Maytag Oven Error Code F-4

Suspect a shorted oven sensor or oven sensor wiring. On Type B clock

Maytag codesMaytag oven codes

Suspect a shorted oven sensor or oven sensor wiring. On Type B clock: oven sensor circuit fault.

First step from the service manual

Press the CANCEL button. If the fault code reappears, disconnect power and check oven sensor continuity and wiring.

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

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What F-4 means on a Maytag oven

The F-4 error code on a Maytag oven indicates a fault in the oven temperature sensor circuit. Specifically, the control detects a shorted condition in the sensor or its associated wiring. On Type B clock-equipped models, this code is defined as an oven sensor circuit fault. The oven temperature sensor is a resistive temperature device (RTD) that changes its electrical resistance as the oven cavity temperature changes, allowing the control board to monitor and regulate heat accurately. A short circuit in this loop causes the control to receive an out-of-range signal, which it flags as F-4.

A shorted sensor or wiring causes the control to read an abnormally low resistance value, which corresponds to an impossibly high temperature reading. This triggers the fault code and typically disables oven operation as a safety measure. The sensor itself can fail internally due to heat stress or age, or the wiring harness connecting it to the control board can develop a short from pinching, insulation breakdown, or contact with the oven cavity walls.

Diagnosing F-4 begins by pressing the CANCEL button to clear the code. If it returns, power must be disconnected before any electrical checks are performed. With power off, the sensor's continuity and resistance should be measured at the sensor connector and compared against expected values for that model. The wiring harness should also be inspected along its full length for damaged insulation, bare conductors, or contact with metal surfaces that could create a short to ground.

Source: manufacturer service documentation.

Common causes of F-4

  1. 01

    Failed oven temperature sensor

    Part replacement

    The RTD sensor probe inside the oven cavity can short internally due to prolonged heat exposure or age. A shorted sensor will read abnormally low resistance at its terminals when tested with a multimeter.

  2. 02

    Damaged sensor wiring harness

    Part replacement

    The wire harness running from the sensor to the control board can develop shorts if insulation has worn away, been pinched by a rack or oven component, or made contact with the oven cavity wall. Inspect the full length of the harness for visible damage.

  3. 03

    Loose or corroded sensor connector

    Wiring / connection

    A connector that has slipped partially apart or corroded can create an unintended electrical path that registers as a short. Check the connector at both the sensor end and the control board end for corrosion or improper seating.

  4. 04

    Control board fault

    Part replacement

    If the sensor and wiring both test within specification, the control board's sensor input circuit may have failed internally. This is less common but possible, particularly on older units.

See the test procedure for each cause

Frequently asked questions about F-4

What does F-4 mean on a Maytag oven?
F-4 indicates a shorted oven sensor or oven sensor wiring circuit. On Type B clock models, it is specifically defined as an oven sensor circuit fault. The control board detected an electrical short in the temperature sensor loop, which prevents accurate temperature monitoring. This typically disables oven operation until the fault is corrected.
Will pressing Cancel or resetting the oven clear the F-4 code?
Pressing the CANCEL button is the recommended first step and may temporarily clear the code. However, if the underlying short in the sensor or wiring is still present, the F-4 code will return when the oven is used again. A reset alone does not fix the electrical fault causing the code.
Is it safe to use my Maytag oven while the F-4 code is showing?
It is not recommended. The F-4 code means the oven cannot accurately monitor its internal temperature due to a sensor circuit fault. Operating the oven in this condition could result in uncontrolled temperatures, potential overheating, or inconsistent cooking results. The fault should be diagnosed and repaired before resuming normal use.
How do I fix the F-4 error on a Maytag oven?
Start by pressing CANCEL and observing whether the code returns. If it does, disconnect power to the oven and use a multimeter to check the resistance and continuity of the oven temperature sensor and its wiring harness. A shorted sensor will need to be replaced. If wiring damage is found, the harness or affected section must be repaired or replaced. If the sensor and wiring both check out, the control board may need evaluation.
How much does it cost to repair a Maytag oven showing F-4?
Repair costs vary depending on the failed component. A replacement oven temperature sensor typically costs between 20 and 60 dollars for the part, with additional labor costs if a technician performs the repair. A wiring harness repair or replacement can range from 30 to 150 dollars in parts depending on the extent of damage. Control board replacement, if required, is generally the most expensive option, often ranging from 100 to 300 dollars or more for the part alone.

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