Vibrating Noise and Electrical Smell

It's done for. get rid of it before it starts a fire.

Hello, Sarkis -

I found 4 descriptions of what may be causing the noise when you operate your microwave oven. See the information on all 4 possible causes here:
https://www.repairclinic.com/RepairHelp/How-To-Fix-A-Microwave/78-88--/Tappan-Microwave-is-loud-or-noisy

Note: Safety advice I have read regarding microwave oven repair is to have a microwave oven repaired only by an authorized repair technician. It is not do-it-yourself work.

Any repair might not be worth the cost compared to purchasing a new replacement. A microwave repair technician authorized to work on Tappan microwave ovens will be able to evaluate what is causing the loud noise and give you an estimate of the repair costs.

Note: If you find you need to replace your microwave oven, please be sure the old microwave oven is sent to electronics recycling.

Best wishes.

The loud noise and no heat means that the magnetron has failed. It the part that generates the microwaves that heat the food. When it fails it shorts out, causing the transformer to heat up. That is what was causing the burning smell. The cost of a replacement magnetron is around $130-150 range so it may not make sense to have it fixed.

have your rear wheel cylenders checked

Two weeks? This is a warranty problem. The buzzing noise was probably either from high-voltage arcing or an overloaded transformer trying to drive a shorted component. The smell is from something electrical getting fried. Remember it; the next time you smell it, you'll know to pull the plug.

if the loud noise is like a vibrating noise then it sounds like the high voltage diode.

freon leak

hi,smell is probably the magetron,arcing...is the inside of the microwave,any burnt marks....hv diode an magetron might be bad...possible shorted hv diode....

you will have to open up the panel to check where the smell comes from. It could be on the motor which may cause also a loud noise or from the electrical, loose connection or bad relay may cause a noise of a different kind.

the magnetron the unit has gone bad.sometimes there is burning smell as u mentioned.it is little expensive repair arond $ 150.00.find out the price of new unit plus iistallation/delivery chg and then make a decision.