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Error code reference

Maytag Range Error Code F1:9

Control not calibrated.

Maytag codesMaytag range codes

Control not calibrated.

First step from the service manual

Replace control.

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

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What F1:9 means on a Maytag range

The F1:9 error code on a Maytag range indicates that the electronic oven control (EOC) has not been properly calibrated or has lost its calibration data. The control board contains non-volatile memory that stores calibration parameters used to regulate oven temperature accurately. When this memory becomes corrupted, fails to initialize correctly, or the control board loses its stored calibration values, the F1:9 fault is triggered. This is fundamentally a control board integrity issue rather than a sensor or wiring problem.

Calibration data in the EOC defines how the board interprets temperature sensor input and adjusts the heating elements accordingly. If this data is absent or corrupted, the control cannot reliably manage oven temperature, making the range unsafe to use for cooking. The fault may appear during initial power-up, after a power surge, or spontaneously if the internal memory of the control begins to degrade over time.

Because the F1:9 code points directly to the control board's internal state rather than an external component like a temperature sensor or relay, the diagnostic path is straightforward. The first and primary recommended step is replacement of the electronic oven control. Unlike sensor-related faults, there are no resistance values or wiring continuity checks that can resolve a calibration failure stored within the control board itself. Attempting to continue operating the range with this fault active is not recommended, as oven temperature regulation will be unreliable.

Source: manufacturer service documentation.

Common causes of F1:9

  1. 01

    Failed or corrupted control board memory

    Part replacement

    The most common cause is internal memory failure within the electronic oven control, where the calibration data stored in non-volatile memory becomes corrupted or is lost entirely. This can happen gradually as the board ages or suddenly due to a power event.

  2. 02

    Power surge or voltage spike

    Part replacement

    A sudden surge in household voltage can corrupt the calibration data stored on the control board without visibly damaging the board. If the error appeared after a storm, power outage, or electrical event, a surge-related memory corruption is likely.

  3. 03

    Control board never initialized from factory

    Part replacement

    In some cases, a replacement control board may arrive without calibration data pre-loaded. If the F1:9 code appears immediately after a control board swap, the new board may require initialization or may itself be defective.

  4. 04

    Intermittent power interruptions causing memory loss

    Wiring / connection

    Repeated brief power interruptions can cause the control board's memory to degrade over time, eventually resulting in complete loss of calibration data. This is more common in homes with unstable power supply.

See the test procedure for each cause

Frequently asked questions about F1:9

What does F1:9 mean on a Maytag range?
The F1:9 code means the electronic oven control is not calibrated. The control board stores calibration data that it uses to regulate oven temperature accurately, and that data has been lost or corrupted. The recommended fix is replacement of the control board, as the issue is internal to that component.
Can I fix F1:9 on my Maytag range myself?
Because the F1:9 fault is caused by a failure within the electronic oven control itself, the repair involves replacing the control board. A technician comfortable with appliance disassembly and working around line voltage components can perform this repair, but anyone unfamiliar with electrical safety should hire a qualified technician. The surface burners may still function normally, but the oven should not be used until the repair is completed.
Will resetting the range clear the F1:9 error code?
A reset by cutting power to the range at the breaker for a few minutes may temporarily clear the display, but if the control board has lost its calibration data, the F1:9 code will return. This is not a soft error that resolves on its own, and a reset does not restore lost calibration data to the board.
Is it safe to use my Maytag range while it shows F1:9?
Using the oven while the F1:9 error is active is not recommended. Without valid calibration data, the control board cannot accurately regulate oven temperature, which means the oven may overheat or underheat unpredictably. Surface burners on a gas or electric range may still operate, but the oven function should be considered unreliable until the control is replaced.
How much does it cost to fix a Maytag range F1:9 error?
The cost to repair a Maytag range F1:9 error depends on whether you hire a technician or do it yourself. A replacement electronic oven control board typically costs between $150 and $350 for the part alone, depending on the specific model. Adding professional labor, total repair costs generally range from $250 to $500 or more. Comparing the repair cost to the age and value of the range is worth considering before proceeding.

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