Question about Microwave Ovens
Quite often this is due to grease or food particles stuck to the inside of the oven or stuck on or behind the waveguide cover.
The waveguide cover is usually about the size of a playing card and often held in place by a plastic rivet.
In some models it is a larger stirrer cover type made of thicker plastic in the ceiling of the oven.
It can be fragile, and the metal edges of the oven behind it can be sharp, so be careful!
The cover and the metal behind it should be cleaned with a mild, non-ammonia cleaner.
If the cavity metal of the oven is chipped or charred, it will have to be sanded smooth and clean and dried thoroughly.
Then you can apply some high-temperature appliance paint, available from places like Wal-Mart, Lowe's or Builder's Square.
If your waveguide cover is burned, it will need to be replaced. It provides important protection for the magnetron.
If the magnetron is damaged, it will have to be replaced, too.
If you or someone you know decide to look into it, we have critical safety information and disassembly information at our site, and our link is at our listing here on FixYa.
You can usually find helpful exploded view diagrams and order parts by entering your full model number here.
There may 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.
If your brand and model are not shown, Please reply back with your brand and model number so we can help you.
We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.
Posted on Sep 25, 2008
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
Here's a link to this great service
Posted on Jan 02, 2017
Tips for a great answer:
Sep 23, 2017 | Daewoo Microwave Ovens
Dec 15, 2015 | Microwave Ovens
May 15, 2014 | Magic Chef 1.6 Cu Ft Countertop Microwave...
Mar 29, 2011 | Sharp Microwave Ovens
Dec 13, 2010 | Whirlpool GH5184XPQ Microwave Oven
Apr 18, 2010 | Microwave Ovens
Apr 10, 2010 | Sharp R-820B Convection/Microwave Oven
Dec 20, 2009 | GE Spacemaker Over-the-Range Microwave
Jun 20, 2009 | Microwave Ovens
Jun 16, 2017 | Panasonic NN-2555A Microwave Oven
38,647 people viewed this question
Usually answered in minutes!