Question about Kenmore 80412 Microwave Oven

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Kenmore Microwave automatically starts popping popcorn

We have a Kenmore microwave hood combination and it randomly will start popping popcorn without anyone touching the microwave. What can we do to fix this? It has started at 2am in the morning so we normally keep it unplugged.

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  • Kenmore Master
  • 9,047 Answers

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 please do not leave it running unattended.

You have a shorting membrane keypad.

On some models, you have to peel off the old one and replace it.

On some models, you remove your controller and move your ciruit boar dinto a new frame with a keypad already installed.

FixYa is not currently notifying us when Clarification Requests are answered, so please contact me directly with your full model number from the tag on / in the unit and color so we can help you with free do-it-yourself tips and/or an estimate.

A full Sears/Kenmore model number has 3 digits, a dot, then 8 more digits, such as ###.########

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

William E. Miller
prototech@usa.net
http://www.microwavedisplay.com

Posted on Oct 06, 2009

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No homegrown popcorn in a microwave? why?


Popcorn is a food that has a very low moisture content, and microwave ovens rely on moisture content (water molecules) in order to cook.

If there is not enough moisture to absorb the microwave energy, much of the the energy is reflected back to the magnetron and damage it.

This is also what damages a microwave when it is run empty.

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This does two things: It keeps the extremely hot popcorn off the tray, reducing the chances it will crack, plus it raises the popcorn up so it will heat more efficiently.

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