Microwave began sparking/smoking under the right rear nylon wheel! When the drawer is opened there is a black spot/discoloration in the lower right rear of the compartment that coincides with the '

William Miller

• 9179 Answers
• Posted on Sep 15, 2006

SOURCE: microwave ovens

The job of the waveguide cover is to protect the waveguide (opening) and the magnetron from buildup of food particles and grease. When the grease and food particles build up on and below the cover, they will carbonize and arc - and maybe even flame up! The solution is to clean it and keep it clean - but if it's too dirty, it must be replaced. Sometimes it's necessary to remove the cover to clean both sides of it, and to clean the edges of the opening it covers. It is held in place with a small plastic rivet (or screw) and once that is removed, the cover will slide over a little then drop down. Be VERY careful not to get cut on the potentially sharp edges of the opening, and do not spray anything into the opening. Apply an alcohol-based cleaner (such as the purple kind) and /or gentle scouring powder to a cloth or paper towel and carefully wipe it out, then when it's dry, reinstall the cover and the rivet. I suggest to my customers that they NEVER use any ammonia-based cleaner (like the blue stuff) on a microwave, since the amonia will crack and distort polycarbonate plastics.

SOURCE: microwave ovens

The cover is probably the magenetron. That is where the microwaves come from. If the bread was moist, it might have left condensate in the unit which is causing the sparking. Unplug the unit, leave the door open over night. If you can remove that cover, do so. Be sure to carefully replace it before using the unit. Never turn on a microwave with nothing in it.

SOURCE: paint chip in Microwave now sparking against wire rack?

Thanks for giving me the opportunity to help.

Go to any hardware or home repair center and look for appliance touch up paint in the color you require. Follow the package instructions and allow the paint to dry for the appropriate time. That should do the trick. If my information has been helpful, please rate my service. Thanks for using FixYa.com

SOURCE: How can I clean the black smoke residue from inside microwave

use a scouring pad.

SOURCE: microwave popped and now does not heat

Okay, first we need to separate the situations. You were boiling water on the stove and had the range hood fan running to **** up the steam. Then you put something in the microwave to heat and you heard a pop and then zip-o.

The water on the stove has nothing to do with the situation, the fan you turn on is not part of the microwave, so it has nothing to do with the microwave.

The pop you heard and then the humming suggests the magnetron failed. You said you found a blow fuse and replaced it and still nothing, right? The magnetron is the most likely culprit...I would think it is safe to say that the magnetron shorted and drew enough current to blow the fuse.

Replace the magnetron and if that doesn't work, let me know here. Good Luck!