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Microwave not heating up food

I have a magic chef microwave; model # MC0153UW. It sounds like its on, then it makes a humming noise. The turntable is not working, and it is not heating up the food. It's just over two years old , and since it's over range a pain to replace. Any suggestions?

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  • Anonymous Mar 20, 2014

    buzzing noise when not in use, is it safe to use?

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This model is a lower-end type that probably didn't cost very much. Since it's over 2 years old, you have no warranty left. Most appliance repair shops charge extra $$ for servicing installed items in the home. You'd probably be better off purchasing a new comparable model. The labor fee alone might equal what you paid for it.

Posted on Jan 08, 2009

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1 Answer

Magic chef microwave


Take the tray and the plastic piece the tray sits on out of the microwave. There is a small motor that turns the turntable. It is probably bad. You should be able to replace the motor from the bottom of the microwave. Part number is 3966820200.

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If the microwave is not heating check magnetron connections, probably you will need to replace the magnetron.

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There are two things that come to mind, the magnetron is starting to fail, or the strapping has come loose on the fan motor housing, unplug microwave oven and remove top, [several screws] carefully inspect the fan for any loose mounts and tighten.

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In many brands, there is a "mini-manual" hidden inside the unit behind the control panel or hidden on the left side behind the grille, which is very helpful when troubleshooting, & testing.

At
our Web site, we have a video available showing how to remove a typical over the range control panel assembly in under 5 minutes.

Some questions to help you or someone you know troubleshoot it:

When you hit "Start" to microwave, do the inside light, cooling fan, and turntable all come on?

If not, then you probably have a bad door switch or door switch mount and should see these files:

http://www.microwavedisplay.com/safety.txt
http://www.microwavedisplay.com/disassembly.txt
http://www.microwavedisplay.com/doorsw.txt

If the inside light, cooling fan, and turntable are all coming on, then the problem is in the high voltage section, and then the next questions arise:

Any unusual noises? Is it louder or quieter than usual?

We have a sound clip of what a microwave should sound like when the cooling fan and high voltage section are operating here.

A loud buzz, hum, or groan is usually a shorted high voltage rectifier diode, but a sound like gurgling into an empty coffee mug is one symptom of a failed magnetron, and yet the mag can be bad without that sound.

If there's no unusual noise, it may just be a bad connection at the magnetron.

Here are some links you or someone you know can use (in order given) for high voltage section test help, but read the safety warnings first:


http://www.gallawa.com/microtech/diode.html
(if it is NOT shorted or burned looking, it's probably fine)


http://www.gallawa.com/microtech/mag_test.html
(continuity can be good even though mag is bad!)


http://www.gallawa.com/microtech/xformer.html

Accessing some parts may require you to pull the oven from the wall and remove the cover.

If so, the installation instructions are very handy, and it's best to have

two people since the microwave can be heavy and awkward.



For more help from Magic Chef / Ewave see here or their contact page or order parts here.

You can download owner's manuals for many Magic Chef models here.

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

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1 Answer

The microwave turns on, but it does not heat the food.


To allow us to help you effectively (at no charge), please post a NEW problem to FixYa, and please include your brand name and the full model number from the tag in or on the unit, your symptoms ("runs but no heat"), as well as the answers to these questions:

- When you try to microwave are the inside light, internal cooling fan and turntable all working?

- Is there any unusual noise or is it louder or quieter than normal?

(A loud buzz, hum, or groan is usually a shorted high voltage rectifier diode, but a sound like gurgling into an empty coffee mug is one symptom of a failed magnetron, and yet the mag can be bad without that sound.)

We have a sound clip here of what a microwave should sound like when the cooling fan and high voltage section are working.

http://www.microwavedisplay.com/mwd_ad_aug_2008_background.mp3

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with out a proper diagnosis, i would have to believe your magnetron is gone

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You can still use it, but must be aware that this is a relatively high power microwave, so food will burn if it isn't turned.

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Sounds like the Magnetron has stopped working. The Magnetron is is a specially designed powerful magnet that generates the high frequency microwave energy used to heat food.

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1 Answer

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check turntable motor or bush, this very easy problem, you can use oven no problem..

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