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Error code reference

Maytag Range Error Code F1-4

Runaway clean condition in lower oven

Maytag codesMaytag range codes

Runaway clean condition in lower oven - temperature above 650°F during clean cycle.

First step from the service manual

Check the sensor and control.

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

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What F1-4 means on a Maytag range

F1-4 is a thermal runaway fault specific to the lower oven cavity. The control board monitors the lower oven temperature sensor (RTD probe) continuously during operation. When the control detects that the lower oven temperature has exceeded 950°F while the door lock is engaged, it trips this fault and shuts down the heating circuit. This condition typically surfaces during or after a self-clean cycle, which is the primary scenario where both extreme heat and a locked door are present simultaneously.

For homeowners, this means the oven's electronics detected dangerously high heat inside the lower oven compartment while the door was latched shut. The oven is designed to run hot during self-clean, but 950°F is beyond the safe threshold the control board will allow. The fault could stem from a temperature sensor that is reading incorrectly high, a failed sensor circuit, or in rare cases, an actual overtemperature condition caused by a runaway bake or broil element.

Before assuming a part has failed, verify the oven has fully cooled and the door has unlocked. If the code returns when you restart the oven or initiate self-clean, the lower oven temperature sensor is the primary suspect and should be tested for proper resistance.

Source: manufacturer service documentation.

Common causes of F1-4

  1. 01

    Failed lower oven temperature sensor (RTD probe)

    Part replacement

    A faulty RTD sensor can send a falsely elevated resistance reading to the control board, causing it to register a temperature above 950°F even when the oven is not that hot. This is the most common trigger for F1-4, especially after repeated self-clean cycles that degrade the sensor over time.

  2. 02

    Actual thermal runaway during self-clean cycle

    Part replacement

    If the bake or broil element fails in a shorted or stuck-on condition during self-clean, the oven can genuinely exceed 950°F. In this case the sensor is reading correctly and the element itself must be inspected and replaced.

  3. 03

    Damaged or shorted sensor wiring harness

    Part replacement

    The wiring harness connecting the lower oven temperature sensor to the control board runs through a high-heat environment. Insulation that has cracked, melted, or shorted against the oven cavity wall can produce out-of-range resistance readings that the board interprets as an overtemperature condition.

  4. 04

    Faulty electronic control board

    Part replacement

    If the sensor tests within the correct resistance range and the wiring harness shows no damage, the control board itself may be misreading the sensor input due to a failed analog input circuit. This is the least likely cause and should only be considered after the sensor and wiring are confirmed good.

See the test procedure for each cause

Frequently asked questions about F1-4

What does F1-4 mean on a Maytag range?
F1-4 means the control board detected that the lower oven temperature exceeded 950°F while the door lock was engaged. This most commonly occurs during or after a self-clean cycle. The fault is designed to shut down the oven and prevent damage from extreme heat. The lower oven temperature sensor (RTD probe) is the first component to check.
How do I fix F1-4 on a Maytag range?
Start by letting the oven cool completely and allowing the door to unlock on its own. Once cooled, disconnect power for 60 seconds to clear the fault. If F1-4 returns, test the lower oven temperature sensor with a multimeter. At room temperature, a functioning RTD sensor typically reads approximately 1080 ohms. A reading significantly outside that range confirms a bad sensor. Replacing the sensor is a DIY-friendly repair on most Maytag ranges and typically requires removing the back panel inside the oven cavity.
Is it safe to use my Maytag range when F1-4 is showing?
No. F1-4 indicates either a genuine overtemperature condition or a sensor failure that is preventing accurate temperature monitoring of the lower oven. Using the oven for cooking or running another self-clean cycle before diagnosing and resolving the fault risks element damage, further control board damage, or in the case of an actual thermal runaway, a fire hazard. The oven should remain off until the sensor and wiring are inspected.
How much does it cost to fix an F1-4 error code on a Maytag range?
If the lower oven temperature sensor is the cause, the part typically costs $20 to $60 depending on the model, and replacing it yourself is a low-difficulty repair with basic tools. If a professional technician does the work, expect a service call fee plus labor, bringing the total to $150 to $300 in most markets. If the control board is at fault, the board itself can cost $100 to $300 and professional installation is recommended for that component.
Can F1-4 on a Maytag range appear if the self-clean cycle just finished?
Yes, this is one of the most common scenarios for F1-4. Self-clean cycles push oven temperatures to 850°F to 900°F, and a sensor that is already degraded or a heating element stuck in the on position can push temperatures past the 950°F threshold before the cycle ends. If the code appeared at the end of or shortly after a self-clean cycle, inspect the lower oven temperature sensor first, then examine the bake and broil elements for visible damage or signs of arcing.

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