Question about Maytag MMV4205 Microwave Oven

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Microwave MMV4205aa no power, circuit is fine. contol panel is blank. feset orfuse?

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  • Anonymous Mar 24, 2009

    I have the same problem. We have looked at the fuse and tested it and it tests out okay.

  • Anonymous Apr 25, 2009

    No power, nothing, both 250v 20 amp fuses are good. This is the second time this has happened. It was fixed the first time under warranty. The repair man took it down, removed a panel, did something (unfortunately no one was watching closely), and it worked until is just failed again with the same symptoms (no lights, no clock, nothing), three days after the 1 year warranty expired.

  • Mark Egan May 11, 2010

    There is an internal fuse that may have blown.

    Replace only with same type and amperage, and be prepared that it may blow again due to a more serious problem.


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  • 8,820 Answers

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 probably download it here.

You can find helpful exploded view diagrams and order parts by entering your full model number from the tag on the oven
here.

Your problem is likely a blown fuse, a bad magnetron thermal cutout / thermostat, or a bad oven cavity thermostat.

Accessing some components for testing and possible replacement will require you to remove the oven from the wall.

If so, the installation instructions are very handy, and it's best to have two people since the microwave can be heavy and awkward.

You can download Whirlpool / Amana owner's manuals and installation instructions here.

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

Posted on Feb 15, 2009

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