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pjw73nh

Maytag microwave MMV4205AAQ Loud noise, smells like burning when mag is on.

9 posts in this topic

Greetings,

 

I am doing some long distance trouble-shooting.  My son has a Maytag microwave MMV4205AAQ Sn 11247452GL.  Has worked fine up until tonight.  When the mag is turned on, it makes a loud (almost vibrating) noise, and after a few seconds smells like burning electronics.. When the mag is off, the unit sounds normal. IE turntable still turns, light and display are normal. 

 

Thoughts?

 

Thanks. 

 

P.../NH

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Does the unit still heat?  

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Just about every time I have had the strong burning smell or even a little smoke, it has always been the H.V. Capacitor burnt up. Can't 100% tell from the diagram, but you should be able to pull back the control panel and get eyes on the cap. Sometimes you can visually see them burnt around the top plastic area.

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Hi Folks,  thanks for the quick replies.  No, the unit does not still heat.  Trying to decide if it's worth fixing (I think this model is about 8-10 years old) or just getting a replacement.  Any thoughts on either?

 

Thanks.

 

P..../NH

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I would replace it if it were mine.

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I would replace it if it were mine.

Agreed, repair cost approaching replacement cost...

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The smell depending on what it smells like could be the mag tube but the loud vibration noise and smell could also just be a shorted high voltage diode.

 

I think it's crazy to not check and see if it's just a simple $10 or less diode if this person is doing the repairs themselves.

 

If having to call a repair company, that's a complete different story.

 

Myself, I can't every remember ever seeing a bad high-voltage capacitor in a microwave cause a burning smell or the loud vibration noises - almost always a shorted diode or mag tube.

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Hello again and thank you for all of the input. Yes, I think I will drive out there at some point and disassemble it and see if it is the the diode (or what it actually is.  I suppose if he is resigned to getting a new one anyway, it's got to come off the wall anyway. Plus a good "postmortem" is almost always a learning experience.

 

Thanks for the suggestions and advice.

 

P.../NH 

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I had a bad high voltage capacitor cause the burning smell and noise before.

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