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Error code reference

KitchenAid Oven Error Code F3

Wiring harness cavity size does not match the previously stored value (cavity size select jumpers indicate a…

KitchenAid codesKitchenAid oven codes

Wiring harness cavity size does not match the previously stored value (cavity size select jumpers indicate a different cavity size than the control was previously configured for).

First step from the service manual

Check the jumpers in the harness to make sure they are for the actual oven size. Replace the control if the F-code is not F3.

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

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What F3 means on a KitchenAid oven

The F3 error on a KitchenAid oven indicates a mismatch between the cavity size jumper configuration in the wiring harness and the cavity size value previously stored in the control board. The control board reads cavity size select jumpers in the harness during operation and compares them to its stored configuration. When these two values do not match, the board throws F3 to flag the discrepancy. The first diagnostic step is to verify the jumpers physically present in the harness match the actual oven cavity size.

For homeowners, this means the electronic control board is reading a signal from a set of small electrical connectors (jumpers) in the wiring harness that tell it what size oven it's installed in. If those jumpers were disturbed during a repair, if the wrong harness was installed, or if the control board was replaced with one configured for a different model, the board will detect a conflict and display F3.

If F3 appears after a control board replacement or any service work involving the wiring harness, the most likely fix is correcting the jumper configuration. If the error code displayed is something other than F3, the control board itself should be replaced, as that points to a board fault rather than a jumper mismatch.

Source: manufacturer service documentation.

Common causes of F3

  1. 01

    Incorrect or disturbed cavity size jumpers in wiring harness

    Wiring / connection

    The cavity size select jumpers in the wiring harness may have been accidentally changed, improperly set, or disconnected during a previous repair. When the jumpers do not reflect the actual oven cavity size, the control board detects a mismatch and triggers F3.

  2. 02

    Wrong wiring harness installed for the oven model

    Part replacement

    If the wiring harness was replaced with one configured for a different cavity size, the jumpers will report incorrect size data to the control board. This triggers F3 because the stored configuration no longer matches what the harness is reporting.

  3. 03

    Control board replaced with unit pre-configured for a different cavity size

    Part replacement

    A replacement control board that was previously stored or configured for a different oven size will have a stored cavity size value that conflicts with the jumpers in the existing harness. This is a common cause of F3 appearing immediately after a board swap.

  4. 04

    Faulty or damaged control board misreading jumper signals

    Part replacement

    If the jumpers are correctly configured for the actual oven size but F3 persists, the control board may be failing to read the jumper signals accurately. In this case the board itself requires replacement.

See the test procedure for each cause

Frequently asked questions about F3

What does the F3 error code mean on a KitchenAid oven?
F3 on a KitchenAid oven means the cavity size select jumpers in the wiring harness are reporting a cavity size that does not match the value previously stored in the control board. The board detected a conflict between these two data points and stopped normal operation to flag the mismatch. This is not a temperature sensor error on this platform, despite F3 sometimes referring to sensor faults on other brands.
How do I fix the F3 error code on my KitchenAid oven?
Start by locating the cavity size select jumpers in the wiring harness and confirming they are set correctly for your actual oven cavity size. If the jumpers are wrong, correcting them should clear the error. If the jumpers are correct but F3 persists, the control board may need replacement. If the code displaying is anything other than F3, replace the control board regardless of jumper condition, as that indicates a board fault.
Can I still use my KitchenAid oven when it shows the F3 code?
Operating the oven with an active F3 error is not recommended. The control board has flagged a configuration mismatch and may not manage oven functions accurately while this conflict exists. Using the oven in this state could result in improper temperature control or other operational issues. Resolve the jumper mismatch or replace the control board before returning the oven to regular use.
How much does it cost to fix the F3 error on a KitchenAid oven?
If the fix is simply correcting the cavity size jumpers in the wiring harness, the repair costs nothing in parts and requires only basic mechanical skill. If the wiring harness needs to be replaced, expect to pay roughly $30 to $80 for the part depending on the model. If the control board requires replacement, parts typically run $150 to $350, with labor adding $100 to $200 if you hire a technician. Jumper correction is a reasonable DIY repair; control board replacement is also manageable for someone comfortable working with appliance electronics.
Why did the F3 code appear on my KitchenAid oven after I replaced the control board?
A newly installed control board may have been pre-configured or previously used in an oven with a different cavity size, so its stored cavity size value does not match the jumpers in your existing wiring harness. Check the cavity size select jumpers in the harness and verify they correspond to your actual oven size. If the jumpers are correct and F3 persists, the replacement board may itself be defective or incompatible with your model.

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