Question about Maytag Appliances Over-the-Range Microwave Oven

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Maytag microwave mmv4184AAQ not heating

Our microwave is not heating. Everything else seems to be functioning normally.

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The common reasons are a shorted diode many use, the inverter board used for control and power, and the Magnetron which does the work

Posted on Dec 07, 2012

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Posted on Jan 02, 2017

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SOURCE: microwave won't heat.

Magnatron is suspect. Need to put a voltmeter and see if the input (primary) side to the high-voltage transformer (big heavy iron thing in there) is getting 120Vac. Don't touch the other (high voltage) side of this transformer. If the power is there, you are looking at replacing the magnatron. Its affordable if you do it yourself - buy the part on EBAY - lookup "universal magnatron"

Posted on Dec 31, 2007

MicrowaveSvc
  • 9047 Answers

SOURCE: Microwave won't heat food.

This would be under warranty, so Maytag should take care of it for you: http://maytag.com/support/index.jsp

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

Posted on Dec 31, 2007

MicrowaveSvc
  • 9047 Answers

SOURCE: My Maytag MMV4205 Microwave Oven runs but does not heat

With the symptoms you have, I would most strongly suspect a shorted high voltage rectifier diode or a bad magnetron, or a loose and possibly corroded connection on the magnetron's terminal.

The diode is a fairly cheap fix, and the mag will cost more.

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.

There should be a "mini-manual" (tech sheet) hidden inside the unit behind the control panel or hidden on the left side behind the grille, which is very helpful when troubleshooting, testing, and locating components.

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.

If you don't find yours, or if you want to look at it without disassembling the oven, you can download it here.

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, it's probably okay)
http://www.gallawa.com/microtech/mag_test.html
http://www.gallawa.com/microtech/xformer.html

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

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

Posted on Dec 15, 2008

  • 1 Answer

SOURCE: mICROWAVE WILL NOT HEAT

23 month old. MMV4205BAS MAYTAG MICROWAVE. WILL NOT HEAT AT ALL. Lights work, turn table rotates, blower works. Everything else seem to work fine. Haven't done any troubleshooting.

Don H

Posted on Sep 06, 2008

  • 36 Answers

SOURCE: Maytag MMV4184AAW Microwave not heating

If you are looking to repair this yourself (along with assoceated risks) to cut test time in half the first test point would be to check for both live and neutral feed to the high voltage transformer. If you have both live and neutral here then the control circuit is working and the fault will lie within the high voltage circuit.

Hope this helps

Posted on Jan 07, 2010

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Appears normal


ya this is the same problem i too had...everything will seem to right but the part required for heating might be damaged internally...try changing tat...here i did the same...

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