Question about Maytag MMV4205 Microwave Oven

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Dead Microwave Microwave went dead after using it to defrost. The lights and everything shut off and won't turn back on. 15 minutes after everything shut off we opened the microwave door to find the inside extremely hot.

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Re: Dead Microwave

Remove the top cover of oven, there should be tec screws on the bottem of unit to remove the cover, check for bad relays,fuses and fuseable links that could have finaly gone bad.

Posted on Jan 27, 2008

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Re: Dead Microwave


check this out.. this might help you.

Posted on Jan 27, 2008

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Microwave went dead as soon as I started heating. Replaced its fuse:58001220

The klystron or the hi voltage transformer are faulty. The klystron is the part that generates the microwaves. The transformer supplies the voltage to operate the klystron.

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Dec 18, 2009 | Microwave Ovens

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Dead microwave

You have likely blown the thermal fuse, its a small silver 1/2" pointy wire on each end and secured by clamp and normally brass crimps to the wires.
usually attached around the fan or motor area.
see this picture

Jan 27, 2008 | Maytag MMV4205 Microwave Oven

1 Answer

Microwave completely dead

A microwave can be dead for many reasons.

If it goes dead for a while during or after cooking then comes back on, the magnetron is probably overheating and causing the magnetron thermostat to open. Then when it cools, it closes the circuit and allows power through again.

If it's intermittent or random, it may be a bad connection, usually on the control board or a loose fuse holder.

If it went dead almost immediately after pressing the Start pad, that's usually a shorted high-voltage capacitor.

If it went dead a few seconds after pressing the Start pad, that's usually a failing high-voltage transformer.

If the fuse is good, it may be an open thermostat or thermal cutout on or near the magnetron or on top of the cavity / body of the oven.

If you or a friend 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:

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

Dec 04, 2007 | Maytag MMV5165 Stainless Steel 1000 Watts...

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