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Error code reference

Maytag Range Error Code F1-2

Runaway cook condition in lower oven

Maytag codesMaytag range codes

Runaway cook condition in lower oven - temperature exceeding safe limits during cooking mode.

First step from the service manual

Check the sensor (1050-1100 ohms), wiring, and control.

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

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  • Step-by-step tests with expected resistance, voltage, and continuity values
  • Wiring diagram references and connector pinouts from the OEM service manual
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What F1-2 means on a Maytag range

The F1-2 error code indicates the control board has detected the lower oven cavity temperature exceeding 650°F while the oven door remains in the unlocked position. This is a thermal runaway condition. The oven is not regulating heat correctly, and the control board has flagged it as a safety concern. The primary components involved are the lower oven temperature sensor (RTD probe), the associated wiring harness, and the control board that interprets sensor resistance values. A runaway bake or broil element, a stuck relay on the control board, or a shorted sensor can all produce this condition.

For homeowners, this code means your oven got hotter than it should have, significantly hotter than any normal cooking temperature, and the control detected it before the door was locked for a self-clean cycle. This is not a normal operating condition. It may mean the temperature sensor is sending inaccurate readings, or it may mean the oven actually overheated. Either way, the range should not be used until the cause is identified.

The first diagnostic step is to verify the actual oven temperature using a calibrated oven thermometer or a multimeter measuring sensor resistance. A healthy Maytag lower oven RTD sensor reads approximately 1080–1090 ohms at room temperature (around 70°F). Readings outside the expected range point directly to a faulty sensor or wiring problem rather than true thermal runaway.

Source: manufacturer service documentation.

Common causes of F1-2

  1. 01

    Faulty lower oven temperature sensor (RTD probe)

    Part replacement

    A shorted or degraded RTD sensor can report artificially high resistance values that the control board interprets as extreme heat. This is the most common cause of F1-2 and is confirmed by measuring sensor resistance at the probe connector, a shorted sensor typically reads significantly below the expected ~1080 ohms at room temperature.

  2. 02

    Damaged or shorted sensor wiring harness

    Part replacement

    Wiring between the lower oven temperature sensor and the control board can short against the oven cavity or chassis, producing erroneous high-temperature signals. Visually inspect the harness for burn marks, pinched wires, or insulation that has melted against the oven interior.

  3. 03

    Stuck relay on the control board causing actual thermal runaway

    Part replacement

    If a relay on the control board welds closed, it can hold the bake or broil element on continuously, causing the oven to genuinely exceed 650°F. If the sensor checks out as healthy and wiring is intact, the control board is the likely culprit and must be replaced.

  4. 04

    Residue or buildup interfering with sensor connection

    Wiring / connection

    Grease or food debris accumulation at the sensor connector can cause intermittent resistance spikes that trigger the F1-2 code without a true component failure. Disconnecting and cleaning the sensor connector terminals may resolve intermittent occurrences of this code.

See the test procedure for each cause

Frequently asked questions about F1-2

What does the F1-2 error code mean on a Maytag range?
F1-2 means the control board detected the lower oven temperature exceeding 650°F while the oven door was in the unlocked position. This is outside normal operating range for any cooking function and signals either a faulty lower oven temperature sensor, a wiring problem, or in some cases an actual thermal runaway condition caused by a stuck relay on the control board.
Is it safe to use my Maytag range with the F1-2 error code active?
No, do not use the range while F1-2 is active. The code indicates either the oven genuinely exceeded 650°F or the temperature sensor is malfunctioning, both conditions make the oven unsafe to operate. Disconnect power to the range at the breaker until you have diagnosed and resolved the cause.
How do I fix the F1-2 error code on a Maytag range?
Start by disconnecting power, then remove the lower oven temperature sensor and measure its resistance with a multimeter. At room temperature (around 70°F), a good sensor reads approximately 1080–1090 ohms. If the reading is significantly lower or shows a short, replace the sensor. If the sensor tests within spec, inspect the wiring harness from the sensor to the control board for damage. If both check out, the control board relay may be the cause and the board will need replacement.
How much does it cost to fix the F1-2 error on a Maytag range?
A replacement lower oven temperature sensor is typically the least expensive fix, with parts running $20–$60 depending on the model, and the repair is DIY-accessible with basic tools. If the control board is at fault, board replacement parts range from $100–$300, and professional labor adds $100–$200 on top of that. Diagnosing the sensor first keeps costs low since it is the most common cause.
Can a bad oven sensor cause the F1-2 code even if the oven did not actually overheat?
Yes. A shorted lower oven temperature sensor sends resistance readings the control board interprets as dangerously high temperatures, triggering F1-2 even when the oven cavity itself is at a normal temperature. Measuring the sensor resistance with a multimeter is the fastest way to determine whether the code reflects a true overheat condition or a failed sensor sending bad data.

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