Question about Maytag MMV4205 Microwave Oven

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Microwave seems to operate normally but does not heat food

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  • Master
  • 578 Answers

Test it. Put a bowl of water in the microwave and place a small (1 or 2 sq inches) piece of aluminum fold next to it. Power the microwave on for 2 or 3 seconds. If the foil sparks, the oven is creating microwaves and should be functioning correctly. If nothing happens to the foil, then you have no microwaves being generated by the klystron tube.

You can spend 80 to 150 dollars to have the oven checked and repaired or you can find another on Craig's List in your community for less than 100 dollars. Alternately, you can replace with a new one for whatever you are able to spend (from 95 to 600 dollars).

Posted on Sep 30, 2009

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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MicrowaveSvc
  • 9098 Answers

SOURCE: Samsung MD800SC Microwave runs but stopped heating

Chances are you have a bad connection, maybe the cook relay or at the magnetron, but feel free to write back with details when it fails again.

Posted on Aug 19, 2008

MicrowaveSvc
  • 9098 Answers

SOURCE: microwave seems to be working

Chances are you have a shorted high voltage rectifier diode or a bad magnetron, but it may be a bad high voltage transformer.

There should be a "mini-manual" hidden inside the unit behind the control panel or hidden on the left side behind the grille, which isvery helpful when troubleshooting & testing.

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

You can usually find helpful exploded view diagrams and order parts by entering your full model number here.

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

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

If you'd rather have a pro take a look, I would recommend that you contact Whirlpool customer service to find your nearest Whirlpool-authorized service center.

Whirlpool customer service is here and you can also enter your model number on that page to download your owner's manual, installation instructions, etc..

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

Posted on Oct 27, 2008

MicrowaveSvc
  • 9098 Answers

SOURCE: Sharp microwave oven model r-1440 runs, but doesn't heat food

Assuming your inside light and turntable come on when you try to microwave, with the symptoms you have, I would most strongly suspect a bad magnetron or a loose and possibly corroded connection on the magnetron's terminal.

If you or someone you know decide to look into it, we have critical safety information and disassembly information at our site, and our link is at our listing here on FixYa.

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.

Here are some links you or someone you know can use for test help, but read their safety warnings first:

http://www.gallawa.com/microtech/diode.html
(if it's not shorted or burned, it'sprobably okay)


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

The best place to order parts for this brand is Encompass (formerly Tritronics).

Or you can call them toll-free at 866-779-5835.


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

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Posted on Feb 08, 2009

ginko
  • 19396 Answers

SOURCE: LG Microwave does not heat food

est the high voltage capacitor,the rectifier diode.or the magnetron. If all this are fine, test the control board.

Thediode and capacitors can br tested. The capacitor must bealloweddischarge before testing, or you risk to get electrocuted, evenifpower is off. Capacitors can get discharged by shorting theirtwocontacts.
Before replacing the magnetron test also the control board.
Replace the magnetron if the checks and all of the high voltage component tests are good, but the unit still does not heat.



All locations, and description of this parts can be located using the diagram here: Counter top.

Parts must be tested to find out what is wrong.

Remember that microwaves are potentially dangerous devices if not repaired properly, the job must be done by a competent person.
A microwave energy leakage test must always be performed when the oven is serviced for any reason.

Regarding parts, contact the seller here to purchase parts.

Posted on Apr 27, 2009

localwonder
  • 6784 Answers

SOURCE: turns on but not heating food sounds a bit louder

Hi, this is common in most microwaves. this abnormal noise is coming from a faulty Magnetron. this device is responsible for the heating process and, it is damaged and not heating at all at this point.Simply replace the Magnetron and, this unit will start to heat once more.

Posted on Jun 01, 2009

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1 Answer

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1 Answer

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