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Error code reference

Maytag Range Error Code F9

Door Latch Supervisory (Door Latched)

Maytag codesMaytag range codes

Door Latch Supervisory (Door Latched) - sounds alarm and resets control to non-cook mode if door latch supervisory logic fails for 2 seconds while door is latched.

First step from the service manual

Unlatch door (if not locked) and press Cancel Key; if door is locked (temp > 400°F), remove power until oven door can be unlatched.

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

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What F9 means on a Maytag range

The F9 error code indicates a door lock circuitry fault. The control board monitors the door lock switches and expects to see them open and close at specific times during the lock and unlock sequence. When the control cannot confirm the proper switch states at the expected moments, it throws F9 and halts operation. This can stem from a failed door lock switch, a damaged wiring harness between the lock assembly and control board, or a mechanically failed lock assembly that prevents the switches from actuating correctly.

For homeowners, this means the oven's electronic control is unable to confirm whether the door is locked or unlocked. The door lock system is critical for self-clean cycles, which require the door to be secured at high temperatures. When the control loses confidence in the lock system's status, it will not allow a self-clean cycle to proceed and may display F9 at startup or mid-cycle. The range burners may still function depending on when the fault occurs, but the oven will be restricted.

Start by inspecting the door lock switch, the wiring harness running to the lock assembly, and the lock mechanism itself for broken connectors, burned terminals, or physical damage. If all wiring and mechanical components check out, the control board itself may be misreading the switch signals and will need replacement.

Source: manufacturer service documentation.

Common causes of F9

  1. 01

    Failed door lock switch

    Part replacement

    The door lock switch signals the control board when the lock has reached its open or closed position. A worn or failed switch will not send the expected signal, causing the control to log F9.

  2. 02

    Damaged or disconnected wiring harness to lock assembly

    Wiring / connection

    Wiring between the door lock assembly and the control board can develop broken terminals, chafed insulation, or loose connectors, especially after repeated self-clean cycles. This interrupts the signal path and prevents the control from reading switch status.

  3. 03

    Faulty door lock assembly

    Part replacement

    The mechanical lock assembly contains the motor and switch components as a single unit. If the lock motor stalls or the internal mechanism binds, the switches never reach their expected positions and the control detects a timing fault.

  4. 04

    Defective control board

    Part replacement

    If the lock assembly and all wiring test correctly, the control board may be failing to process the switch signals properly. This is the least common cause but is the correct next step once all other components are confirmed good.

See the test procedure for each cause

Frequently asked questions about F9

What does F9 mean on a Maytag range?
F9 means the control board has detected a door lock circuitry fault. The control monitors the door lock switches and expects them to open and close at specific times. When it cannot confirm the correct switch states, it displays F9. The fault can be in the door lock switch, the wiring harness, the lock assembly itself, or in rare cases the control board.
How do I fix the F9 error code on my Maytag range?
Start by unplugging the range and inspecting the door lock assembly, the door lock switch, and the wiring harness connecting them to the control board. Look for loose connectors, burnt terminals, or broken wires. If the wiring looks intact, manually check that the lock assembly moves freely without binding. Replace any damaged components. If everything checks out mechanically and electrically, the control board is the next part to replace.
Can I still use my Maytag range when the F9 code is showing?
Surface burners may still operate depending on when the fault appears, but you should not attempt to run a self-clean cycle with an active F9 code. The self-clean cycle requires a confirmed door lock before reaching high temperatures, and running it with a faulty lock system is a safety risk. Resolve the F9 fault before using the oven or attempting any self-clean function.
How much does it cost to repair an F9 error on a Maytag range?
A replacement door lock assembly typically costs between $40 and $120 in parts depending on the model. A new control board runs $150 to $300 or more. If you hire a technician, expect an additional $100 to $200 in labor. Diagnosing the fault yourself first, by checking the wiring and lock mechanism before replacing parts, can save significant cost since the wiring fix requires no parts at all.
Why does my Maytag range show F9 at the start of a self-clean cycle?
The control board runs a check of the door lock switches at the beginning of the self-clean cycle to confirm the door can be secured. If the lock switch does not respond as expected, or if the lock assembly fails to complete its travel, the control aborts the cycle and displays F9. Check that nothing is obstructing the door latch area, that the lock assembly moves freely, and that the wiring connections at the lock are secure.

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