Question about Maytag MMV4205 Microwave Oven

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Maytag microwave overheated.

After an extreme overheating/smoke out of a ceramic dish nad sigle item microwave has no power lights at all. IS there a reset or fuse or way to inspect for irreversble damage?

Posted by falcomf on

  • falcomf Oct 18, 2007

    After checking the fuses, location of fuses is accurate in the fridgetech post, I had to look elsewhere for the issue. Under the skin at the top of the unit I found a small round thermostat. Using the ohm meter to test it was showing 0 resistance as compared to  other thermostats showing infinite resistance. Removed it, applied AC power and hot wired to leads together as a test. Unit now Boot's up. Ordered the thermostat. Would never run the unit without it!

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Craig Shelton

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There is a fuse that should be easy to get to behind the control panel.  Will need to take the grill off first to get control panel off.  Make sure unit is unplugged first.  There are high voltage parts in a microwave so you should have a professional do the work if you are not comfortable with it.  Would appreciate a solved rating for expert advice.

Posted on Oct 18, 2007

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All controls,lights,fans are normal. Turntable, microwave, convection do not work. Internal fuse?


There typically is an internal ceramic fuse. It is usually near where the power cord enters the oven, or behind the control panel (on over the range units).

The problem you are describing, though, sounds like it may be an open thermal protector on the cavity. Most are diamond shaped, with two wires. Unless the cavity is extremely hot, it should show continuity.



If you need further help, I’m available over the phone at https://www.6ya.com/expert/david_29ad5d1dd86564b0

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