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Error code reference

Maytag Range Error Code F3-1

Upper oven sensor is shorted (below 100 ohms) or open (above 5K ohms).

Maytag codesMaytag range codes

Upper oven sensor is shorted (below 100 ohms) or open (above 5K ohms).

First step from the service manual

Check upper sensor, harness, and connections.

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 F3-1 means on a Maytag range

F3-1 on a Maytag range indicates the control board has detected an out-of-range resistance reading from the upper oven temperature sensor (also called the upper RTD sensor or oven probe). The board expects a resistance value between approximately 100 ohms and 5,000 ohms from this sensor circuit. When the reading drops below 100 ohms, the board interprets this as a short circuit. When it rises above 5,000 ohms, the board interprets this as an open circuit. Both conditions prevent the control from accurately reading oven temperature, so it shuts down the upper oven and displays F3-1.

For homeowners, the upper sensor is a small probe mounted inside the upper oven cavity, usually at the back wall near the top. It sends a continuous resistance signal to the control board so the oven knows what temperature it has reached. When this signal is disrupted, either because the sensor itself has failed, or because a wire in the harness connecting it to the board has broken or shorted, the oven cannot regulate heat safely and stops operating.

The most common points of failure are the sensor probe itself and the wiring harness that runs from the sensor through the oven cavity to the control board. Connection terminals at either end of the harness are also frequent culprits, particularly in ranges with significant heat exposure over time.

Source: manufacturer service documentation.

Common causes of F3-1

  1. 01

    Failed upper oven temperature sensor

    Part replacement

    The upper RTD sensor probe degrades over time due to heat cycling and can develop an internal short or open circuit. When this happens, the resistance reading falls outside the 100-5,000 ohm range the control board expects, triggering F3-1.

  2. 02

    Damaged or broken wiring harness to upper sensor

    Part replacement

    The harness running from the upper sensor to the control board can develop breaks, pinches, or burned sections, particularly where it routes near heating elements or through tight cabinet passages. A broken wire creates an open circuit above 5,000 ohms, while a shorted wire pushes resistance below 100 ohms.

  3. 03

    Loose or corroded sensor connector terminals

    Wiring / connection

    The plug-in connectors at the sensor end or the control board end of the harness can back out, corrode, or develop a poor contact. This intermittent or complete loss of connection registers as an open circuit and triggers the F3-1 code.

  4. 04

    Faulty control board

    Part replacement

    If the upper sensor and the entire harness test within the correct resistance range at the connector but F3-1 persists, the control board's sensor input circuit may have failed. This is the least likely cause and should only be suspected after the sensor and harness are confirmed good.

See the test procedure for each cause

Frequently asked questions about F3-1

What does the F3-1 error code mean on a Maytag range?
F3-1 means the control board measured a resistance reading from the upper oven temperature sensor that is either below 100 ohms (shorted) or above 5,000 ohms (open circuit). In either case, the control board cannot get a valid temperature reading from the upper oven sensor, so it stops operating the upper oven and displays the code. The problem is in the sensor itself, the wiring harness connecting it to the board, or the connector terminals.
How do I fix the F3-1 error code on my Maytag range?
Start by disconnecting power to the range, then locate the upper oven temperature sensor on the back wall inside the upper oven cavity. Unplug the sensor connector and use a multimeter to measure resistance across the sensor terminals. A working sensor should read approximately 1,080 ohms at room temperature (around 70 degrees F). If the reading is below 100 ohms or above 5,000 ohms, replace the sensor. If the sensor tests correctly, inspect the harness and connectors for damage or poor contact. Replacing the upper oven sensor is a repair most DIYers can complete with basic tools.
Is it safe to keep using my Maytag range when the F3-1 code is showing?
The upper oven will not operate while F3-1 is active because the control board has disabled it as a safety measure. Without a valid temperature signal, the oven cannot regulate heat, so the lockout is intentional. If your range has a separate lower oven or a cooktop, those functions may still work depending on your model. Do not attempt to bypass the error to force the upper oven to run.
How much does it cost to fix an F3-1 error on a Maytag range?
An upper oven temperature sensor is typically the least expensive repair for this code. Replacement sensors for Maytag ranges generally cost between $20 and $60 for the part. If you do the repair yourself, that is often the only cost. A service technician call will add a diagnostic fee plus labor, typically bringing the total to $100-$200 depending on your region. If the control board is the cause, board replacement costs significantly more, often $150-$350 for the part alone.
How do I test the upper oven sensor to diagnose an F3-1 code on a Maytag range?
Disconnect power to the range before any testing. Access the upper sensor connector, which is usually reachable after removing the back panel or through the oven cavity depending on your model. Set a multimeter to measure resistance (ohms) and probe across the two sensor terminals. At room temperature, a good sensor reads close to 1,080 ohms. A reading under 100 ohms confirms a short in the sensor, and a reading over 5,000 ohms confirms an open circuit. If the sensor passes this test, reconnect it and check resistance at the control board end of the harness to isolate any wiring issue.

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