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Error code reference

KitchenAid Microwave Error Code F2-E3

Key held down too long, or key is shorted.

KitchenAid codesKitchenAid microwave codes

Key held down too long, or key is shorted.

First step from the service manual

Disconnect power or unplug oven, check keypad connector for firm connection. Press CANCEL; if error returns after 60 sec, replace keypad.

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

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What F2-E3 means on a KitchenAid microwave

The F2-E3 error code on a KitchenAid microwave indicates that the control board has detected a keypad key being held in the active state for an extended period, or that a key contact is shorted. The control system continuously monitors input signals from the keypad membrane. When a single key registers as continuously pressed beyond the allowed time threshold, the board flags the fault to prevent unintended operation or runaway commands. This is a keypad-level fault, meaning the issue originates in the membrane keypad assembly or its connection to the control board rather than in the magnetron, inverter, or any high-voltage component.

The most common physical cause is a failure in the membrane keypad itself. Over time, the conductive traces or contact pads inside the flexible membrane can degrade, become contaminated with moisture or grease, or develop an internal short that mimics a sustained key press. In other cases, the ribbon cable connector that links the keypad to the control board can work loose or develop a poor contact, sending a corrupted signal that the board interprets as a stuck key. A less common but possible cause is a failure on the control board itself, where the input circuit for a particular key zone has developed a fault.

Diagnosis starts with disconnecting power to the microwave completely, then inspecting the keypad ribbon connector for a firm, fully seated connection. After restoring power, pressing CANCEL clears the active fault. If the F2-E3 code returns within 60 seconds, the keypad membrane is the primary suspect and should be replaced. If a new keypad does not resolve the fault, the control board may require replacement.

Source: manufacturer service documentation.

Common causes of F2-E3

  1. 01

    Failed keypad membrane

    Part replacement

    The flexible membrane keypad develops an internal short or degraded contact pad that continuously signals a key press to the control board. This is the most frequent cause when the error returns quickly after pressing Cancel.

  2. 02

    Loose or poorly seated keypad ribbon connector

    Wiring / connection

    The ribbon cable connecting the keypad to the control board can work loose over time, causing corrupted input signals that the board reads as a stuck key. Disconnecting power and firmly reseating the connector may resolve this without parts.

  3. 03

    Moisture or grease contamination under the keypad

    Part replacement

    Liquid or cooking grease that has seeped beneath the membrane surface can bridge key contacts and create a persistent short. Inspect the keypad surface and surrounding area for signs of residue or damage.

  4. 04

    Physically stuck or damaged key

    Part replacement

    A key that has been physically depressed and is mechanically stuck in the pressed position will trigger this fault. Examine each key on the panel for one that feels sunken, stiff, or unresponsive to normal touch.

  5. 05

    Control board input circuit fault

    Part replacement

    If replacing the keypad does not clear the F2-E3 error, the control board itself may have a failed input circuit for a key zone. This is the least common cause and is typically diagnosed only after keypad replacement fails to resolve the issue.

See the test procedure for each cause

Frequently asked questions about F2-E3

What does F2-E3 mean on a KitchenAid microwave?
F2-E3 indicates that the control board has detected a keypad key held in the active state for too long, or that a key contact is shorted. The microwave flags this fault to prevent unintended operation from a stuck or malfunctioning key. The fault originates in the keypad membrane or its connection to the control board in most cases.
Will resetting the microwave clear the F2-E3 error?
Disconnecting power and pressing Cancel after restoring power can temporarily clear the F2-E3 code. However, if the underlying keypad fault is still present, the error will return within about 60 seconds. A reset alone is not a fix, it is a diagnostic step to determine whether the fault is persistent.
How do I fix the F2-E3 error on my KitchenAid microwave?
Start by unplugging the microwave and checking that the keypad ribbon connector is firmly seated on the control board. Restore power and press Cancel. If the error returns within 60 seconds, the keypad membrane needs to be replaced. If a new keypad does not resolve the fault, the control board may also need replacement.
Is it safe to use my KitchenAid microwave while the F2-E3 error is showing?
A persistent F2-E3 fault means the microwave is detecting abnormal input signals from the keypad, which can lead to unpredictable behavior or unintended operation. It is best to avoid using the microwave until the faulty keypad or connection is inspected and repaired.
How much does it cost to repair a KitchenAid microwave F2-E3 error?
If the repair requires only a new keypad membrane, parts typically range from around $30 to $90 depending on the model, plus labor if a technician is performing the repair. If the control board is also at fault, total repair costs including parts and labor can range from $150 to $350 or more. Getting a repair estimate before proceeding is recommended, especially on older units.

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