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Error code reference

KitchenAid Microwave Error Code F6E3

Mini oven/warm drawer over temperature

KitchenAid codesKitchenAid microwave codes

Mini oven/warm drawer over temperature - oven is not equipped with this feature.

First step from the service manual

Enter Diagnostics mode, then replace user interface with correct control associated with this product.

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

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What F6E3 means on a KitchenAid microwave

The F6E3 error code on a KitchenAid microwave indicates a mismatch between the installed user interface control board and the actual appliance hardware. Specifically, the control is reporting an over-temperature condition for a mini oven or warm drawer, but this particular unit is not equipped with that feature. The error is not triggered by an actual thermal fault or sensor reading. Instead, it reflects a software or hardware incompatibility where the user interface board is designed for a different model or configuration that includes a mini oven or warm drawer function.

The root cause is almost always an incorrect user interface board installed in the appliance, either during a previous repair or at the point of assembly. When the control board does not match the product's feature set, it may attempt to monitor or communicate with subsystems that do not exist on the unit. This communication failure or phantom signal then generates the F6E3 fault code. Entering Diagnostics mode is the recommended first step to confirm the mismatch and identify the specific control discrepancy.

Resolving this error requires replacing the user interface board with the correct part that corresponds to this specific KitchenAid microwave model. Simply resetting the unit or cycling power will not resolve the underlying incompatibility. The replacement control must match the product's exact configuration to eliminate the fault and restore normal operation.

Source: manufacturer service documentation.

Common causes of F6E3

  1. 01

    Incorrect user interface board installed

    Part replacement

    The most likely cause is that a user interface board intended for a different model or feature configuration was installed during a previous repair. The installed board is programmed to communicate with a mini oven or warm drawer that does not exist on this unit, triggering the F6E3 fault.

  2. 02

    Wrong replacement part ordered at prior service

    Part replacement

    A technician or DIYer may have ordered a control board using an incorrect part number, resulting in a board with a different feature set being installed. Verifying the model number and cross-referencing the correct user interface part is essential before replacement.

  3. 03

    Factory assembly error with mismatched control

    Part replacement

    In rare cases, a control board from a higher-featured model variant may have been installed at the factory. This would cause the F6E3 code to appear from initial use or after the first diagnostics cycle.

  4. 04

    Control board firmware mismatch

    Part replacement

    A user interface board with incorrect firmware for this product line can cause it to report features and faults that do not apply to the unit. Entering Diagnostics mode can help confirm whether a firmware or hardware incompatibility is present.

See the test procedure for each cause

Frequently asked questions about F6E3

What does F6E3 mean on a KitchenAid microwave?
F6E3 indicates that the user interface control board is detecting an over-temperature condition for a mini oven or warm drawer, but this microwave is not equipped with that feature. The error points to a mismatch between the installed control board and the actual appliance configuration. It is not a true thermal fault but rather a hardware or software incompatibility. The fix is to replace the user interface board with the correct one for this specific model.
Can I fix the F6E3 error myself on my KitchenAid microwave?
Resolving F6E3 requires entering Diagnostics mode to confirm the control board mismatch, then replacing the user interface board with the correct part for your model. If you are comfortable working with appliance electronics and can correctly identify the right replacement board using your model number, this is a repair a knowledgeable DIYer can attempt. However, because microwaves contain high-voltage components including capacitors that can hold a dangerous charge even when unplugged, caution and proper safety procedures are essential. Many people prefer to have this repair completed by a qualified technician.
Is it safe to use my KitchenAid microwave when F6E3 is showing?
The F6E3 error is caused by a control board incompatibility, not an actual overheating event, so it does not necessarily mean the appliance is unsafe to use in the immediate sense. However, operating an appliance with a mismatched control board is not recommended, as the control may not properly manage or protect the unit. It is best to have the correct user interface board installed before continuing regular use.
Will resetting my KitchenAid microwave clear the F6E3 error?
No, resetting the microwave by cycling power or tripping the circuit breaker will not clear the F6E3 error. The fault is caused by a permanent hardware mismatch between the installed user interface board and this model's feature set. The error will return as long as the incorrect control board remains installed. The only lasting fix is replacing the user interface board with the correct part.
How much does it cost to repair the F6E3 error on a KitchenAid microwave?
The cost to repair F6E3 depends primarily on the price of the correct replacement user interface board and any labor charges if a technician performs the work. User interface boards for KitchenAid microwaves typically range from around $75 to $250 or more depending on the model. If you hire a technician, expect additional labor costs in the range of $80 to $150 or higher depending on your location and the service provider.

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