Question about Kenmore 80412 Microwave Oven

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Microwave does not heat

The lights comes on, the plate turns and the fan comes on as well. It just won't heat any food

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Re: Microwave does not heat

2 problem magnitron or high voltage capacitors one of this bad

Posted on Sep 19, 2007

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Re: Microwave does not heat

Try unplugging the unit and do not enter the time of day, just hit clear. Place a cup of water in a microwave approved container and see if the unit heats. I have the samr problem.

Posted on Jan 29, 2008

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SOURCE: Microwave turns on, but no heat or turntable movement

Quite often this is due to a bad door switch. Opening the door while cooking (without first hitting the STOP pad) is the primary cause of door switch failure, but it may also be a broken switch mount. I have a text file called "doorsw.txt" which helps in diagnosing and repairing door switch problems, and a file called "safety.txt" which is of vital importance. It is at our site, which is linked at our listing here on FixYa: You can find helpful exploded view diagrams and order parts by entering your base model number (without the suffix) here: or at

Posted on Mar 20, 2007

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My microwave won't heat anything up. The light comes on, the plate turns round and it makes all the right noises but it doesn't heat anything up.

Since the light and fan work the main board or the processor is working .Now identify the parts by clicking this link:

As there is no heating please do not switch on unless you have confirmed the fault. It is possible that the Magnetron is faulty, the temperature cut off is faulty or the main capacitor is short. It is also quite possible that insect can get into the oven and create soft spots. When you switch on these will create a short and make the voltage jump and in the long run damage the magnetron.
So Remove cover after disconnecting , check for dirt/moisture in the cabin, if so wipe clean and dry, check the magnetron and area clean and use an jet air to clean off. Check the wave guide covers, if food had deposited
then it must be checked or replaced.

See link:

Now keeping clear of the microwave, switch on, use a cup of water inside to test.
If you notice any sparks shut off as the magnetron or the main HT capacitor can be faulty. replace with same type.
If there is heating without any issues, you can use the microwave safely

Thank You for using FIXYA.

Sep 17, 2011 | Belling Microwave Ovens

1 Answer

My samsung microwave oven is not heating up food. It works normally, lights on, food turning on plate, but not heating the food.

if your microwave does everything you have described , and you can hear the cooling fan running as well after you press the start button , you probably have a faulty wave guide. The wave guide is also called a Magnetron Tube. It is the main part of the microwave which produces the microwave energy . If this part is not functioning it is best to replace the entire unit, rather than have it repaired .

Oct 03, 2010 | Samsung Microwave Ovens

1 Answer

Food won't heat up

Hello, I had the same problem, and just fixed mine. Start by turning on your microwave (on mine, the light turned on and timer worked, but the fan nor the plate turned)... push the door upward and see if the microwave turns on... (mine did). so far so good. open the door and take the upper hinge cap off with flat head screwdrive. take the door off and place a small washer on the bottom hinge, put the door back on. your microwave should be good now. essentially, the door just needs to be pushed up a bit so it will work.
good luck, hope that works for you...

Jun 01, 2010 | Frigidaire FMV156DC Microwave Oven

3 Answers

Microwave will not heat any thing.

the plate has nothing to do with the microwave heating up the food
but the magnetron that heat the food is bad and will need replacing
I would ask a electronic shop how much they would charge to replace it , and if is not worth it to you then a new one would be a good call

Dec 01, 2008 | GE Microwave Ovens

1 Answer

My microwave heats but shuts off due to the fan not coming on

A little late for a reply; you probably have replaced it by now.

I suspect it shuts down because the fan is no longer turning on and there is probably a thermal shutoff switch near or on the magnetron to prevent the chance of fire.

Jan 08, 2008 | GE JVM1190 Microwave Oven

1 Answer

Plate won/t rotate no reheating

PLease open the housing of turn table motor at bottom of the oven and check for the AC input voltages on motor terminals as specified on sticker on motor. for no heating please check fuse between high voltage transformer and high voltage capacitor. Also check high voltage Diode and Magnetron.Please please don't try to measure voltage on terminals of magnetron.

Jul 29, 2007 | Whirlpool MH6141XK Microwave Oven

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