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Error code reference

Jenn-Air Microwave Error Code F6E5

Cavity size is incorrect.

Jenn-Air codesJenn-Air microwave codes

Cavity size is incorrect.

First step from the service manual

Press System Info, Model and Size; verify and correct cavity size if incorrectly shown.

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

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What F6E5 means on a Jenn-Air microwave

The F6E5 error code on a Jenn-Air microwave indicates that the control system has detected an incorrect or unrecognized cavity size configuration. Jenn-Air microwaves use software-based configuration settings to define the physical dimensions of the cooking cavity. When the cavity size stored in the control board's memory does not match an expected value, the unit flags F6E5 to alert the technician that a critical setup parameter is wrong. This mismatch can prevent the appliance from operating correctly, as cooking algorithms, power levels, and sensor routines are all tied to cavity size data.

The most direct diagnostic approach is to access the System Info menu on the control panel, then navigate to the Model and Size section. From there, the displayed cavity size can be reviewed and corrected if it does not reflect the actual installed unit. This situation most commonly arises after a control board replacement, a software reset, or a firmware update that clears or corrupts stored configuration data. In some cases, improper initial installation or a unit that was incorrectly programmed at the factory can also produce this code.

If the cavity size setting is corrected through the System Info menu and the code clears, no parts replacement is typically required. However, if the setting cannot be saved, reverts after correction, or the menu is inaccessible, the main control board may be failing and unable to retain configuration data. In that scenario, board replacement followed by proper reprogramming is the likely resolution.

Source: manufacturer service documentation.

Common causes of F6E5

  1. 01

    Incorrect cavity size stored in control settings

    Wiring / connection

    After a control board replacement or software reset, the cavity size parameter may default to an incorrect value or be left blank. Accessing System Info and correcting the size entry typically resolves the error without any parts replacement.

  2. 02

    Control board replacement without reprogramming

    Wiring / connection

    When a new control board is installed, unit-specific configuration data including cavity size must be manually entered. Skipping this step will trigger F6E5 immediately.

  3. 03

    Firmware update clearing configuration data

    Wiring / connection

    A firmware or software update can occasionally wipe stored settings, causing the cavity size field to become empty or corrupted. Navigating to the System Info menu to re-enter the correct value should clear the code.

  4. 04

    Control board unable to retain settings

    Part replacement

    If the cavity size is corrected but the error returns after power cycling, the control board may have a memory fault and cannot store configuration data reliably. Board replacement and reprogramming would be required.

  5. 05

    Incorrect factory programming

    Wiring / connection

    In rare cases, a unit may leave the factory with an incorrect cavity size stored in its control system. This would cause F6E5 on first use and is resolved by correcting the setting through the System Info menu.

See the test procedure for each cause

Frequently asked questions about F6E5

What does F6E5 mean on a Jenn-Air microwave?
F6E5 indicates that the microwave's control system has detected an incorrect cavity size configuration. The stored size setting does not match a valid expected value. This is a software configuration issue that is typically corrected through the System Info menu on the control panel rather than by replacing parts.
How do I fix the F6E5 error on my Jenn-Air microwave?
Press the System Info button on the control panel, then navigate to Model and Size. Review the displayed cavity size and correct it if it is wrong or blank. Once the correct size is entered and saved, the error should clear. If the error returns after power cycling, the control board may need professional evaluation.
Is it safe to use my Jenn-Air microwave while it shows F6E5?
It is not recommended to operate the microwave while F6E5 is active. The cooking algorithms and power management routines depend on the cavity size setting being correct. Running the unit with incorrect configuration data could result in improper cooking behavior or other faults.
Will resetting my Jenn-Air microwave clear the F6E5 error?
A simple power reset is unlikely to clear F6E5 because the error is tied to a stored configuration setting, not a temporary fault. The cavity size must be reviewed and corrected through the System Info menu. If the setting is correct but the error persists after a reset, a control board issue may be involved.
How much does it cost to repair a Jenn-Air microwave with an F6E5 error?
If the issue is only a misconfigured setting, a service call to diagnose and correct the cavity size through the System Info menu might cost anywhere from $75 to $150 depending on local labor rates. If the control board needs replacement due to a memory fault, total repair costs including parts and labor could range from $200 to $450 or more depending on the specific model.

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