Question about Maytag MMV4205 Microwave Oven

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Wiring diagram Problem - Maytag MMV5207A 1100 Watts Microwave Oven

Fixing a broken power connector from the MW unit to the fan/blower. Need to see a wiring diagram so I get the pin out correct. No diagram in my manuals. Where can I download a wiring diagram for my Maytag MMV5207A 1100 Watts Microwave Oven? I tried to get from Maytag. No can do they say. We'll be glad to send a repair man they say. Pete The cooling fan for the Megnetron, etc. start slowly and acclerates after about 50 seconds and as well the fan seems to modulating like the connection is not good. Other wise the microwave works perfectly. I am wondering if the fan is a one speed or does it varies with the temperature of a senor somewhere. For the last 3 years since new the fan has run at a constant speed from the start of "cooking". Upon observation of the fan blade it is running at all times. The fan blade spins freely with no power.

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  • 9,098 Answers

If it is the magnetron cooling fan, it should be a one-speed type.

Assuming your AC line power is correct (110-125VAC) then the fan may be bad, or there may be a problem with the relay on the control board or indeed a bad connection in the wiring.

The way I would test it is to disconnect the fan and the connect a line cord directly to it.

I've uploaded the wiring diagram to my site at:
http://207.234.249.73/mwd/mmv5000_wiring.gif

If you think it's the control board, we repair these for $39.95 in most cases.

We have full details, plus *critical* safety, disassembly, and troubleshooting info at our site. You'll find a link to our site in our
listing here on FixYa: http://tinyurl.com/yzjozk

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

Posted on Jan 13, 2008

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Posted on Jan 02, 2017

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This doesn't have the diagram hidden away somewhere inside? Check at the bottom edge of the control panel, transformer brack, or rear of the oven. Otherwise, you can find wiring diagrams of earlier models that may be close enough. Just enter your model number here: http://tinyurl.com/gv383

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