Question about Microwave Ovens
Microwave ovens are covered with a special durable paint and that helps reduce sparking. The problem is the area that you are seeing this at has become dirty with food debris. You need to clean it very well and if the paint has come off, repaint it with special paint. The paint can be found on amazon dot com and the cleaning has to be done without getting any moisture in the wave guide (which is behind the thing you called the vent.)
Posted on Nov 25, 2013
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Posted on Jan 02, 2017
It sounds like your varistor or low voltage transformer on your control circuit board is failing.
We repair these for customers nationwide with our guaranteed $39.95 service.
Please feel free to contact me directly if you need more help. And please mention your model number when you write.
We're happy to help and we appreciate your thoughtful rating of our answer.
William E. Miller, AS-EET
Posted on Jul 12, 2008
SOURCE: Re: microwave does not heat
Is very unlikely that there could be any other electrical failure since everything else seems to be working.
If you are able to fix it yourself then is way more cheaper just to buy the magnetron.
Click here to find the magnetron.
Before you do any work on this device, please click here to know how to discharge the high voltage capacitor and other safety concerns when working with devices that generate high voltages.
I would say is not worth it to spend more then $100.00 for a 5+ years old microwave.
Posted on Jul 16, 2008
If the supply voltage is low it will take long time to heat foods. The second reason is the Magnetron. Since it is in the warranty period you can call at the sharp authorised service center. They will do it free of coast.
Posted on May 04, 2009
SOURCE: Sparks ae flying in my microwave
GE in essence says it is unrepareable and insafe. I suggest that would be saying it is trash.I don't know what that carboard is, possibly indulation? Ot may have /be a a oiece oce of laminated metal like some paper plates have..Not replaceable is a poor answer. Call them back and make a fuss. If it's not too far over warranty, they may work with you to shut you up.. oops, sorry, to pacify you.
:-) Good luck.
Posted on May 28, 2009
SOURCE: Sharp r-820BC sparks
often this is due to grease or food particles stuck somewhere in the
cavity of the oven or stuck on or behind the waveguide cover.
It may also be in the area of the turntable support, coupler, or motor.
The waveguide cover (also called a spatter shield) is usually about the size of a playing card and often held in place by a plastic rivet.
It can be fragile, and the metal edges of the oven behind it can be sharp, so be careful!
The waveguide 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.
We have the service / repair manual for this model and have uploaded it to our site here to help you.
It will give you safety info, step by step help in disassembly, troubleshooting tips, and part numbers.
Most computers will open this document automatically, but you may need the free Adobe Reader
You can order parts from Encompass here or you can call them toll-free at 866-779-5835.
We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.
Posted on Jun 08, 2009
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