mypros+
Error code reference

KitchenAid Microwave Error Code E3

Keypad error

KitchenAid codesKitchenAid microwave codes

Keypad error — key stuck or keypad fault.

First step from the service manual

Press CANCEL. If error code returns after 60 seconds, replace keypad.

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

MyPros+ Max

Get the full diagnostic procedure for E3.

  • Step-by-step tests with expected resistance, voltage, and continuity values
  • Wiring diagram references and connector pinouts from the OEM service manual
  • Verified part numbers when replacement is required
Get the full procedure

$29/month · Cancel anytime · Or $9.95 3-day pass

What E3 means on a KitchenAid microwave

The E3 error code on a KitchenAid microwave indicates the control board has detected a keypad fault. This occurs when the control board receives a continuous signal from one or more keys on the membrane keypad, or when it detects an abnormal response pattern from the keypad membrane itself. The condition can stem from a physically stuck key, moisture or debris trapped beneath the membrane, or a failed keypad assembly that is sending erroneous signals regardless of user input.

For homeowners, E3 essentially means the microwave thinks a button is being pressed when it should not be, or the keypad has stopped communicating correctly with the rest of the unit. This can happen if a key is physically jammed down, if food residue or liquid has worked its way under the membrane panel, or if the keypad has simply worn out over time. The microwave locks out operation because it cannot reliably interpret user commands while this fault is present.

Pressing CANCEL clears the error temporarily. If E3 returns within 60 seconds with no keys being touched, the keypad membrane or its ribbon cable connection to the control board is the likely source of the fault and the assembly will need to be replaced.

Source: manufacturer service documentation.

Common causes of E3

  1. 01

    Physically stuck or jammed keypad button

    Wiring / connection

    A key on the membrane keypad is mechanically depressed or stuck, sending a continuous signal to the control board. This can happen due to warped plastic, a damaged membrane, or debris lodged beneath a specific key.

  2. 02

    Moisture or food residue under keypad membrane

    Wiring / connection

    Liquid or food debris that has seeped under the membrane can create an unintended electrical bridge across keypad contacts, causing the control board to read a key as permanently pressed.

  3. 03

    Failed or worn keypad membrane assembly

    Part replacement

    Over time, the membrane keypad can degrade internally, causing contact layers to short against each other or lose proper resistance. This produces a false stuck-key signal even with no physical obstruction.

  4. 04

    Loose or damaged ribbon cable connection between keypad and control board

    Part replacement

    The ribbon cable connecting the keypad membrane to the control board can become unseated or develop a break, causing the control board to misread keypad input and trigger the E3 fault.

See the test procedure for each cause

Frequently asked questions about E3

What does E3 mean on a KitchenAid microwave?
E3 on a KitchenAid microwave signals a keypad fault, meaning the control board has detected a key that appears stuck or a keypad that is not communicating correctly. The microwave cannot distinguish your intended inputs when this condition exists. Pressing CANCEL will temporarily clear the code, but if it returns within about 60 seconds on its own, the keypad membrane assembly needs to be replaced.
How do I fix E3 on a KitchenAid microwave?
Start by pressing CANCEL and waiting 60 seconds. Inspect the keypad surface for any visibly stuck or depressed keys and check for moisture or debris around the edges of the membrane panel. If cleaning the surface and ensuring no keys are physically jammed does not resolve it and the code returns on its own, you will need to replace the keypad membrane assembly. This part is specific to your model number and typically attaches to the door panel with a ribbon cable connection to the main control board.
Can I still use my KitchenAid microwave with the E3 error code active?
No. When E3 is active, the control board is receiving conflicting or erroneous signals from the keypad and cannot reliably process commands. Operating the microwave in this state is not recommended because the unit may not respond to inputs correctly, including STOP or CANCEL commands during a cooking cycle. Resolve the keypad fault before resuming normal use.
How much does it cost to fix an E3 error on a KitchenAid microwave?
If the issue is a stuck key or surface debris, there is no parts cost. If the keypad membrane assembly needs replacement, the part typically costs between $30 and $80 depending on your specific KitchenAid model. DIY replacement is feasible for most homeowners since it involves removing the control panel housing, unplugging the ribbon cable, and swapping the membrane. Professional repair labor adds roughly $80 to $150 on top of parts if you prefer a technician to handle it.
Why does E3 keep coming back on my KitchenAid microwave after I press CANCEL?
If E3 returns within 60 seconds of pressing CANCEL without any keys being touched, the fault is almost certainly internal to the keypad membrane itself rather than a simple stuck key. The membrane contacts have likely degraded or shorted internally, or moisture has reached the contact layer. Repeated clearing with CANCEL will not resolve the underlying fault. Replacing the keypad membrane assembly is the correct fix at this point.

Related KitchenAid microwave codes

All KitchenAid microwave codes
View all 60 KitchenAid microwave codes

78,000+ service manuals · 160,000+ error codes · 55+ brands

Get Started

$29/month · Cancel anytime · Or $9.95 3-day pass