Question about Microwave Ovens

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The microwave come on lights up in side, but does not get the food/item warm or hot.....

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Generally, the most common causes of a failure to heat are:

- bad door switches or door switch mounts
- loose connection at the magnetron
- problem or loose connection on the control unit circuit board
- bad magnetron or other high voltage part (such as a shorted diode)

If you or someone you know decide to look into it, we have critical safety information, info on door switch diagnosis and replacement, and disassembly information at our site, and our link is at our listing here on FixYa: http://tinyurl.com/yzjozk

You can usually find helpful exploded view diagrams and order parts by entering your full model number here: http://tinyurl.com/gv383

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

Posted on Mar 10, 2008

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would you not also get hot when in use . if you were heating food to be totally cooked .that is why they have a fan in them

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2 slices of bread wrapped in paper towel microwave set on defrost set 35 seconds caught fire


Microwaves work by friction. They blast water molecules in the food so they move fast, just like rubbing your hands together makes them hot. Some types of microwave in defrost mode actually apply FULL POWER for a short period of time so to make the product warm to the touch. This heat then penetrates down to the core of the food, ensuring full defrost. In your case the heat was sufficient enough to heat the dry paper towel to set it on fire.
Bread is better defrosted on the low power setting as sliced bread is very thin. Items should only be defrosted on the defrost setting that are thick and need to be completely defrosted on the inside. Remember microwaves only penetrate the surface of food, making that hot. Thermal conduction does the rest.
You should never use paper towels in a microwave unless the instructions for doing the food say so. You wouldn't put a paper towel in a gas or electric oven, so don't put them in a microwave.

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I would try troubleshooting the "defrost circuit". The behavior sounds like the microwave is cooking in the defrost mode, where it actively cooks then stops allowing the food to rotate and the heat to spread then actively cooking again.

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Microwave turns on but wont cook food


It is most likely the magnetron, but! there are two more items that will do the same, a cracked high voltage diode and a shorted high voltage capacitor.

Mar 21, 2012 | Oster Microwave Ovens

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Our new microwave heats the containers but not the food. Container is too hot to touch. Food "looks" hot, usually boiling - but food isn't even warm.


Check on the material the containers are made of. If they are not microwave friendly then they will cause problems.
Some materials are designed to "Roast" the contents by absorbing the energy.
Check with a Pyrex glass container and water. The glass should stay fairly cool.

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Microwave making loud noise while heating food. And food does not get warm or hot.


sounds like the magnetron has failed on this unit...it is located in side behind the control panel touch pad and if replaced usually requires disassembly of the outer shell of microwave... it is a common problem with microwaves and can be fixed just requires taking apart unit to do it...good luck to you

Jan 09, 2011 | Kenmore Microwave Ovens

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Our emerson microwave will not make anything hot.put in time for something to cook it runs fine but it will not make the food hot HELP!!!!! the sides and top and bottom of microwave are warm but food is...


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Here is a tip that will help you to figure out what is wrong with your Microwave Oven....

Microwave Oven Basic Troubleshooting Tips

heatman101

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Does not heat food but appliance cabinet gets very warm, some warpage of appliance liner.


One solution could be that the vents of the microwave need cleaning out.You can do this by just pulling out the blockage.
Then see if it will heat food.

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My ifb microwave oven is getting hot outside while


Normally when u cook food in microwave the fod is cooked by microwaves, which means the heat is generated with in food. The temperature inside is never too hot and all the heat produced is absorbed with in the food.

On the other hand when the grill is switched on, a separate heatting element gets switched on. You can see this red hot element on the top side of inside of microwave. the heat from this element gets transferred to food through air circulation. But partof heat also gets transferred to the walls of microwave oven. This is the reason the wall feel hot during use of grill.

As i see ther is no problem with the microwave itself. Jut kep delicate thngs a bit away from the microwave.

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Re: Overheat Microwave or...?


Magnetron (supplies microwave radiation [energy]) or any of the high voltage components internally. More than likely, the HV (high voltage) diode has burned out and is probably cheaper to purchase a new one than have someone repair it unless they can do it for free or you simply pay for the part.

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