Everything works except the Microwave. Even when you start the Microwave the table turns etc but no heat. Was making a buzzing noise then burning smell.

I would replace unit. they get cheaper ,every year. If the magntron is bad the part is $200.00 plus labor.
Whirlpool Microwave GH5176XPS0 Parts List

It can be the fuse supplying the magnetron, or the magnetron itself which has failed. Another suspect is the high voltage capacitor in this circuit.


Don't try to fix this yourself as the internals of a microwave are dangerous, with high voltages even when unplugged.

You may have failing magnetron or shorted high voltage diode, but on some models, it is a failing capacitor on the controller.

We would need to know the full model number from the tag in the cooking cavity or elsewhere on the microwave, such as the door frame, controller frame, etc.

Please post a new help request with that and more detailed symptoms.

Hello,

It could be an issue with the diode, high-voltage capacitor or the magnetron itself.

Please try following the steps from this article:

http://www.partselect.com/repair.aspx?appliance=microwave&part=no-heat

don;t worry;
all you need to do is lubricate the fan bearings with light machine oil and make sure the fan is not hitting anything

All:
I have a 2003 Sears Ultra Wave microwave 721.63682300 with a similar problem. A few months ago it started giving off short buzzes when turned on. That stopped but then I noticed that everything took twice as long to heat up. After quite a bit of teardown&inspection I found a circuit break in the inverter board leading to ZD704 diode (pictured). I will now try to find a replacement diode to see if replacing will fix it. Thanks for your postings.

does it make any buzzing noises

I have a GE counter top microwave oven. When the oven starts cooking (the magnetron turns on) the oven makes a harsh buzzing noise. What is wrong and what should be done?

The noise is coming from the high-voltage transformer being overloaded by something shorting it out. Either the magnatron or the high-voltage capacitor and diode. Replace the capacitor and diode then if still not working, replace the magnatron. Its only affordable if you do it yourself - buy the part on EBAY - lookup "universal magnatron"
Hope ya fix it!

This is not safe. If the fan is not running, the magnetron will quickly overheat and be destroyed. We answered this in more depth in the other place you asked it.