May microwave Oven Model MMV4205BA won't heet

READ YOUR MANUAL OR GET ONE ONLINE.

It may be a shorting high voltage capacitor, but may also be a bad magnetron or high voltage transformer.
Here are some links you
or someone you know can use for test help, but read their safety
warnings first:

http://www.microtechfactoryservice.com/diode.html

(if it\'s not shorted or burned, it\'s
probably okay)

http://www.microtechfactoryservice.com/cap_test.html
http://www.microtechfactoryservice.com/mag_test.html
http://www.microtechfactoryservice.com/xformer.html


You can find
helpful exploded view diagrams and order parts by entering your full
model number from the tag on the oven here.

We\'re
happy
to help you with free advice and we\'d appreciate your thoughtful rating
of our answer.

Hi,
Here is a tip that will help you to figure out what is wrong with yourMicrowave Oven....

Microwave Oven Basic Troubleshooting Tips

heatman101

Hi,
Here is a tip that will help you to figure out what is wrong with yourMicrowave Oven....

Microwave Oven Basic Troubleshooting Tips

heatman101 [][
][]

Hi,
Here is a tip that will help you to figure out what is wrong with yourMicrowave Oven....

Microwave Oven Basic Troubleshooting Tips

heatman101
';;';'

GE Will replace the magnetron for 9 years! Mine is a 2004 model with a one year warrently according to manual. HOWEVER they did say the magnatron was covered for nine years: call 888-239-6832. When I called they said thats all they get calls for and would send out in 3-5 days. NO CHARGE. I had to ask if there was coverage longer than a year on major parts and that's when they offered the info and I eventually was transferred to the right office. Saved $120 bucks on parts alone.

Hi,

Here is a tip that will help you to figure out what is wrong with your Microwave Oven....

Basic Microwave Oven Troubleshooting Tips

heatman101

,./././././././././././././././././././

Please remove the cover and check the door safety interlock switches. Check with a contunity checker or a volt ohm meter.

What happens is thjis: when the oven is running ane you open the door, the tiny contacts in these little swirtches arc and burn. Eventually, the switches fail. When this happens, the oven doesn't know the door is closed. When The door is open, the oven will not turn on the magnatron. No magnatron, no heat.

It could be the start capacitor, but not likely compared to the switches. Dont try to service the capacitor unless and until you understand the danger.

Thanks for posting your question at FixYa.com - please vote.

Thanks

a

you may have some arching inside where your magnatron is located.If you open the door on the right middle part there is a silverplate on the wall .If it is burned you may need to replace magnatron.if you do not seee burn marks it may still be the magnatron hope.that would be the only possible thing that would make the noise other then the mtor plate out of place.

As promised, here is your solution information:

You can download Maytag owner's manuals, installation instructions, and parts lists here.

You can find the service manual (which may not have a parts list) by selecting Literature by Model on this page and entering your exact model number with suffix. (Also try it without suffix if you have trouble).

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.

You need all three of those documents in some cases.

Finally, you can find helpful exploded view diagrams and order parts by entering your full model number here.

At our site, we now have a video available showing how to remove a typical control panel assembly in under 5 minutes.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

William E. Miller
[email protected]
http://www.microwavedisplay.com