Question about KitchenAid KHMS155LSS 1000 Watts Microwave Oven

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Microwave makes beeping noises and comes off and on by itself

My microwave will starting beeping and turn itself on and off and then words come across the screen. I have already replaced the mother board once and the microwave is only 3 1/2 years old. It happens more when the vent is on.

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  • KitchenAid Master
  • 9,047 Answers

The first thing I would suggest is a hard reset. Unplug the unit for a minute or so. Then plug it back in, set the clock and try again.

If that doesn't work, leave it unplugged for about 5 minutes.

Otherwise, you probably have a failed membrane keypad.

Is it possible that some spray cleaner or steam accidentally got into the controls?

Direct spraying of cleaners on the keypad and steam from the cooktop can damage the controls.

I always recommend that you spray non-ammonia cleaner on a soft cloth (not a paper towel which can scratch) and gently wipe the keypad.

And I always recommend that you use the vent fan whenever you're cooking on the stove top to keep heat, steam, and grease out of the controls and door panels.

Also be sure your filters are cleaned, or in the case of charcoal types, replaced.

If it does not dry out over time, it may need to be manually dried or blown out.

The keypad may be damaged or worn out, or control unit may be damaged.

If you (or someone you know) might want to replace it yourself, I have uploaded a handy guide with pictures showing you what's typically involved.

There should be a "mini-manual" (tech sheet) hidden inside the unit behind the control panel or hidden behind the grille, which is very helpful when troubleshooting, testing, and locating components.
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.

But please note that for some models, the membrane keypad is not
available as a separate part, so you would have to order the control
panel frame assembly which comes with a new keypad.

In this case, you simply move your circuit board into the new frame.
That is a simple do-it-yourself
job.


microwave makes beeping noises and comes off and o - d13bd32.jpg

You can find links to helpful exploded view diagrams and part ordering help here.

I recommend that you bookmark that link to your favorites. Feel free to contact me directly (and please remind me of your full model number from the tag on the unit) for more information & help.

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

William E. Miller, AS-EET
prototech@usa.net
http://www.microwavedisplay.com
Microwave Oven Control Panel Repair Nationwide

Posted on May 28, 2010

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