Question about Maytag MMV4205 Microwave Oven
Chances are the magnetron is overheating. This can be due to a failed internal cooling fan or a failing magnetron.
I would suggest trying to run it on the lowest power setting and see if it runs significantly longer. With a cup of water inside, press Cook time > 4 > 0 > 0 > Power > 1 > Start. If it runs the full 4 minutes, then it is overheating at full power.
The internal cooling fan must be running whenever the microwave is cooking.
(That fan is not to be confused with the hood vent exhaust fan, which can be turned on and off at will)
It can fail if the motor is bad, or if there is a bad connection or relay on the control circuit board.
We regularly repair these controllers for customers nationwide with our guaranteed $39.95 service in about a week.
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.
You can usually find helpful exploded view diagrams and order parts by entering your full model number here.
There should also be a "mini-manual" hidden inside the unit behind the control panel or hidden on the left side behind the grille, which is very helpful when troubleshooting & testing.
We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.
Posted on Sep 26, 2008
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Posted on Jan 02, 2017
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