Question about Kenmore 80412 Microwave Oven

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Everything appears to be working, but it does not heat the food

I made popcorn. The first bag burned the second bag took a long time to cook and the third bag did not pop at all. Tried unplugging over night and heating water the next day, still didn't heat.

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  • Master
  • 3,037 Answers

Sounds like the magnetron has failed. This is the component that produces the microwaves that heats the food.

The cost of the magnetron is about 95% of the cost of a microwave oven. Most people don't, for this reason, replace the magnetron, they replace the whole oven which is probably what you will end up doing.

There is a possibility that the circuit that provides power to the magnetron is faulty and you need to take it apart, find the proper electrical leads and test them with a volt meter. To do this you have to remove it from its mounting and take it apart. It is a fairly lengthy process however.


Benjamin

Posted on May 26, 2009

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Posted on Jan 02, 2017

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SOURCE: Toaster Master 1979 has less power

Because the microwave energy is beamed into the interior of the microwave and then dispersed by a metallic "stirrer," the pattern of the energy can be fairly consistent, rather than completely random. But this pattern sometimes causes certain portions of the food to overcook (creating tough spots) and others to undercook. A microwave oven with a carousel is far better at cooking the food consistently--the pattern becomes quite random while the carousel is turning.

Posted on Nov 13, 2008

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Shut's off after cooking popcorn, only popcorn, won't restart for 15 too30min.


Sounds like the magnetron is over heating. Try putting a 4 0z cup of water in the oven along side the popcorn bag. See if this helps. Usually, the oven only runs 2 to 2.5 minutes for a bag of popcorn. You may have to experiment with the slightly different cooking time...

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Arcing will occur if you have any metal inside the microwave, or if the powder paint on the inside has been damaged. If the paint is damaged dispose of the microwave

Oct 24, 2013 | Sharp Microwave Ovens

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Have a kitchenaid microwave KHMS2040WSS brand new. Is there a way to set the popcorn sensor for a smaller bag? Right now it is set for 3.5oz and burns all the popcorn.


I have never seen a microwave that doesn't burn popcorn if you use the "popcorn" button. Why the manufacturers keep putting them on I'll never understand. There's nothing you can do change the presets on an oven since they are built into the controller. Instead of relying on the oven, you should follw the directions on the bag. These tell you to use high power, stay by the oven and stop the cooking when the time between pops drops to 1 or 2 seconds. Stored heat will continue to pop kernels for a bit, and you won't cremate your popcorn. You'll also avoid the possibility of the bag catching fire and damaging the oven, which I have seen several times. Finally, don't expect 100% of the kernels to pop. There wil always be a few duds, and extending the cooking time just results in burned popcorn.

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What should my powerlevel be on on my microwave because it keeps burning my popcorn


Your power level should be on high, but you shouldn't rely on the oven to time the cooking. I have yet to find an oven that won't burn popcorn if it has a preset POPCORN button. Press it and walk away and next thing you know, you've got charcoal. You should always stick around while making popcorn. Stop the oven and take the bag out when the time between pops drops to 1 or 2 seconds. The corn will continue to pop on its own for a bit because of stored heat, but you won't burn it. You'll never get 100% of the corn to pop, so don't worry about unpopped kernels.

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Microwave will not cook or heat anything. Cooked a bag of popcorn just fine, tried to cook a second one and nothing happened. I thought the bag of popcorn was bad but it won't even heat water.


sounds like the magnetron has went out...this is the device that actualy converts the electricity into a heating source ... it is a common problem and can be costly,,it is not very hard to change just requires pulling the microwave if it is a cabinet mount and taking the exterior cover off and getting to the magnetron...the problem is the cost of the magnetron is normally somewhere in the range of a $100.00 and your time alot of people choose to get another one due to not being that much more expense and the work involved to repair yours.... good luck hope this helps...
please vote.....

Jan 03, 2011 | Frigidaire GLMV168K Microwave Oven

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We can't get our microwave to fully pop the bag of popcorn. If we use the popcorn button it stops before the bag even starts popping. If we preset the time, the same occurs and if we run it until its...


Always place the bag of popcorn on an upside-down paper plate.

This allows more microwaves to penetrate the bag from the bottom.

Also always place food of any kind in the microwave off-center on the tray, NOT in the middle of the tray.

Not only does it cook more evenly (think of how you stir liquid) but it also prevent the same spot from being heated repeatedly on the glass turntable, which can lead to overheating and breakage.

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

Sep 06, 2010 | Dacor DMT2420SS Microwave Oven

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Microwave burns popcorn. what part is defective?


If the microwave functions normally while cooking everything else, but is only burning popcorn, there is no component problem that will cause this. You cannot adjust or replace any internal component to make it not burn popcorn. All power levels and program options are contolled by the consumer at the control panel. Refer to your owner;s manual for their recommendations.

If the oven is equipped with a popcorn feature button, it is programmed for a recommended power level and time. This is an ESTIMATED program feature. The manufacturers of both the oven and the popcorn will also give directions that tell you to turn the oven off when the popping slows to about a pop every 2 seconds. Failure to do so can result in burning.

If the microwave does not come with a popcorn feature button, the manufacturers of the popcorn have directions on the outside of the box that tell you what POWER LEVEL and TIME to set the oven on for the desired result. Again, the you still have to listen as the bag pops to ensure it does not burn.

In addition, on some microwave ovens, there is a feature that allows you to select the SIZE of the popcorn bag. Some popcorn manufacturers have smaller snack size bags that don't take as long to pop. You have to select the appropriate size to get the correct program option.

In any case, you never are to place popcorn in a microwave oven and walk away from it. All these program features are ESTIMATIONS based on manufacturers testing and recommendations for the best results. All microwave ovens are different and operate at different power levels. Your best judge is to listen as it pops.

I hope this helps you.

Dec 23, 2009 | GE XL1800 1100 Watts Microwave Oven

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Toaster Master 1979 has less power


Because the microwave energy is beamed into the interior of the microwave and then dispersed by a metallic "stirrer," the pattern of the energy can be fairly consistent, rather than completely random. But this pattern sometimes causes certain portions of the food to overcook (creating tough spots) and others to undercook. A microwave oven with a carousel is far better at cooking the food consistently--the pattern becomes quite random while the carousel is turning.

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I have a JVM1603BJ03 space saver micro wave. The turn table cracked in two, the plastic support device to turn the glass table has desenigrated into several small pieces. It appears the micro wave is...


Do you cook a lot of popcorn?

Do you place your food items in the center of the turntable as opposed to placing them off-center?

Both can cause repeated heating of the same spot on the turntable, which can stress it and allow it to crack.

You can buy replacement parts here.

I suggest that when you cook popcorn, place a paper plate or two upside-down under the bag and always place your food items off-center on the turntable tray.

Once you have the new parts, I would suggest at least a quick heat test. That is to heat one cup of water on high and it should boil in about 2 to 2-1/2 minutes.

If you would like to perform a more standard heat test, please see my Ask Mr. Microwave page.

If your magnetron is indeed running too hot, then it is probably dying. Sometimes - like a star - they can burn hotter right before they die.

We're happy to help and we appreciate your thoughtful rating of our answer.

Jul 04, 2008 | GE Microwave Ovens

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