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Error code reference

Maytag Range Error Code F1-1

Runaway cook condition in upper oven

Maytag codesMaytag range codes

Runaway cook condition in upper 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
  • Verified part numbers when replacement is required
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What F1-1 means on a Maytag range

The F1-1 error code on a Maytag range indicates the control board has detected that the upper oven cavity temperature has exceeded 650°F while the oven door remains in the unlocked position. This is a thermal runaway condition. The control board monitors the upper oven temperature sensor (RTD sensor) continuously, and when the sensed temperature crosses this threshold without a corresponding self-clean lock cycle being active, it flags F1-1 and interrupts normal operation to prevent damage or a safety hazard.

For homeowners, this means the electronics inside your range detected the upper oven getting dangerously hot. Hotter than any normal cooking function should produce. The oven door lock mechanism is not engaged, which rules out a self-clean cycle as the intended cause of the high heat. Something is allowing the oven to run far beyond its normal maximum baking or broiling temperature. The range shuts down to protect itself and your kitchen.

The most common culprits are a failed temperature sensor giving a false high reading, a shorted sensor circuit, or a runaway bake or broil element that is not cycling off properly. A failed relay on the control board can also cause an element to stay energized continuously, driving temperatures beyond safe limits.

Source: manufacturer service documentation.

Common causes of F1-1

  1. 01

    Faulty upper oven temperature sensor (RTD)

    Part replacement

    A failed or shorted RTD temperature sensor can report artificially high resistance values or a short to ground, causing the control board to read temperatures far above actual oven conditions. This is the first component to test per the diagnostic sequence for F1-1.

  2. 02

    Stuck or shorted bake/broil element relay on control board

    Part replacement

    If the relay controlling the bake or broil element welds closed, the element stays energized continuously without cycling off, causing actual oven temperatures to climb well past 650°F. The control board triggers F1-1 when the sensor confirms the runaway temperature.

  3. 03

    Damaged or shorted sensor wiring harness

    Part replacement

    Wiring between the upper oven temperature sensor and the control board can develop a short or intermittent connection due to heat exposure over time. A shorted harness can send a false high-temperature signal to the control board, triggering F1-1 without the oven actually overheating.

  4. 04

    Runaway bake or broil element (element staying on without cycling)

    Part replacement

    A bake or broil element that fails in a manner that causes it to draw continuous power, combined with a relay that does not interrupt it, can drive actual upper oven temperatures above 650°F. In this case, F1-1 reflects a real thermal event rather than a sensor error.

See the test procedure for each cause

Frequently asked questions about F1-1

What does error code F1-1 mean on a Maytag range?
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.
Is it safe to use my Maytag range with the F1-1 error code active?
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.
How do I fix F1-1 on a Maytag range?
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.
How much does it cost to repair F1-1 on a Maytag range?
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.
Can a bad temperature sensor cause F1-1 even if the oven is not actually overheating?
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.

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