Question about KitchenAid KHMS155LSS 1000 Watts Microwave Oven

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I have a Kitchenaid Microwave, KHMS155LSS-4. It comes on suddenly in the middle of the night or it will start beeping during the night. It shows error message F2 or just says ERR. When I unplug it and let it sit for a couple of days, it works ok again. What is the problem?

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  • KitchenAid Master
  • 9,047 Answers

F2 means you have a shorting membrane keypad. If and when an oven is coming on or doing anything by itself, this is very dangerous and can result in a fire.

So until it is repaired, please leave it unplugged or leave the door open when it's not in use, and of course one should never leave a microwave unattended while cooking.

This is actually a simple do-it-yourself job. You simply move your circuit board into the new frame.

At our Web site, we have a video available showing how to remove a typical over the range control panel assembly in under 5 minutes.

Next, disconnect the strip as shown in the photo below, then remove the screws that hold your circuit board in the old frame.

I have a Kitchenaid Microwave, KHMS155LSS-4.  It - 405cda9.jpg

Then carefully (since the display is made of glass) move your circuit board to the new frame, and reassembly is the reverse of disassembly.

The part number to order is W10306627 (formerly 8205018) and you can get it here for $107.05 plus shipping.

You can also find helpful exploded view diagrams at that link.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

Posted on May 06, 2010

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