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Question about KitchenAid KBMC140HSS Convection/Microwave Oven

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Keypad going out

The keypad keeps going out on my kbmc140hss. It has happened now three times in 1.5 years. Kitchenaid keeps replacing the keypad,under warranty, but the problem keeps re-occuring and I keep having to pay a service charge. The last itme it happened, the repair company they suggested had replaced 3 door switches thaey claimed were also bed, to the tune of $150.00. Any other reasons anyone knows of that could be causing this to happen?

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William Miller

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  • 9,179 Answers

The main reason door switches go out is by opening the door while it's cooking, instead of hitting the STOP button first. Otherwise, like anything man made, they can fail. And for safety's sake, they should all be replaced when one is bad. If a keypad is failing repeatedly, I would suspect outside contamination or an inherently bad design. But I've not before heard of repeated keypad replacement. Moisture and contamination can be caused by not using the hood fan when boiling on the stove top, spraying of cleaners, by storing the microwave in an unheated garage or shed, or infestation. I warn my customers to never spray cleaner directly onto the microwave keypad, since the liquid can get inside and "lock up" or even ruin the keypad or controller. Apply an alcohol-based cleaner (such as the purple kind) to a cloth (paper towels can scratch) and gently wipe it off. I suggest to my customers that they NEVER use any ammonia-based cleaner (like the blue stuff) on a microwave, since the ammonia will crack and distort polycarbonate plastics. Hope this helps.

Posted on Nov 22, 2006

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If you might want help with repairing it, please note that FixYa is not currently notifying us Experts when Clarification Requests are answered.

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It comes as an assembly, so it's pretty easy to replace yourself. It is part number 4453420 and you can get it here for $235.33 plus shipping.

You can also find helpful exploded views at that link.

The picture below shows you how to unlock a typical membrane keypad connector.

34374fd.jpg

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