Question about Microwave Ovens

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Sparks Flying I have a Sharp Microwave Model R-410LK about 22 months old. Recently I noticed sparks when I would heat up food and eventually small flames around the right side of the microwave near the vent/ light. I called Sharp who said that it was out of warranty and they could send me to an authorized dealer. I'm wondering if it could be the magnetron, which has a 5 year limited warranty. I hate to have to buy a new microwave after only 2 years. Any suggestions?

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  • 16,043 Answers

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

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MicrowaveSvc
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SOURCE: LG LMV2053ST sound of sparks at top-front-right side.

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
prototech@usa.net
http://www.microwavedisplay.com

Posted on Jul 12, 2008

  • 2318 Answers

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.
Good Luck.

Posted on Jul 16, 2008

najah
  • 180 Answers

SOURCE: Sharp microwave losing cooking power

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

co7196
  • 3433 Answers

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

MicrowaveSvc
  • 9047 Answers

SOURCE: Sharp r-820BC sparks

Quite 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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1 Answer

I have a GE microwave that is barely a year old. Recently, my husband was heating up some melting chocolate and white sparks started flying within the microwave. When we opened it, all we saw was that some...


Very difficult to explain briefly as microwaves are truly complex.
You will almost certainly have 2 problems. 1)You need to carefully sandpaper the area where the paint is peeling off and "only paint with appliance paint as this does not have lead in it and 2)The sparks are due to a variety of things, but the most obvious, replace your main capacitor and HV diode. This combination is the normal culprit for arching. If it continues after that, the Magnatron needs replacement as well (Unfortunately, for first time diagnosis, electrical testing equiptment is needed.)

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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.

May 28, 2009 | General Electric Microwave Oven

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Sharp microwave losing cooking power


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.

May 04, 2009 | Microwave Ovens

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When using on small amounts of food would burn (spark & flame)


Sparks in microwaves are caused by metal things in there. What kind of plate - any metal or gold leaf decoration on it?
Try a microwave safe dish.
Make sure you do not use metal items in microwaves.
I do not know the model number of your nuker, is it a new one or old? How long have you had it, and has it always done this?

Apr 26, 2009 | GE Microwave Ovens

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the burning is normally caused by a small particle of food getting stuck on the waveguide cover, this then carbonises and starts to arc. replacing cover should return oven to normal

Feb 22, 2009 | Sharp R-1480 Microwave Oven

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1. You have to clean m/w inside from all kind of grease and food resedue.
2. Inspected m/w cavity inside and clean all burning spots with sand paper.
3.Apply touch paint on this spots.
Different color touch paint you can buy at any appliance patrs store.

Dec 01, 2008 | Sharp Microwave Ovens

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Microwave solutino


This is usually due to grease or food particles stuck to the inside of the oven or stuck on or behind the waveguide cover.

When it gets heated repeatedly, it chars and eventually carbonizes.

Unless it sparks or is cracked or broken, it should be okay, but if you notice it getting darker over time, I'd order a new one.

You can order Sharp parts from Tritronics at http://www.wehaveparts.com

For other brands, you can usually find helpful exploded view diagrams and order parts by entering your full model number here: http://tinyurl.com/gv383

We're happy to help and we appreciate your thoughtful rating of our answer.

William E. Miller, AS-EET
prototech@usa.net
http://www.microwavedisplay.com

May 22, 2008 | Sharp R-520LK Microwave Oven

1 Answer

Sharp selling bad microwaves


paddy paddy paddy i want i want, bet you were spoiled as a child, never continue to use a microwave that sparks, you can only do more damage to the appliance and maybe even worse is this sparking when you use it under normal conditions, place a plastic bowl with cold water in and see if it sparks then, if not then is it something you have done, i assume you know what you can not put in a microwave if sparking occurs anyway, and its only 6 months old, is it under guarantee, then its simple, send it back and ask for free replacement SHOUT AT THE RIGHT PEOPLE DON'T WASTE TIME ON HERE

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Sparks are flying


This needs to be corrrected. 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 behind 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 or is burned, 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 sometimes 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 ammonia will crack and distort polycarbonate plastics. If you or a friend decide to work on it, we have *critical* safety & disassembly info at our site, which is linked at our listing here on FixYa: http://tinyurl.com/yzjozk Even better, we have the full service manual in PDF format available for download at http://207.234.249.73/mwd/r930ak_aw_sm.pdf It will guide you through the safety issues and give you exploded views and part numbers in case you need to order parts, which you can get at Tritronics at http://www.wehaveparts.com

May 12, 2007 | Sharp R-930AK Convection/Microwave Oven

1 Answer

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That panel is probably mics, not netla, though it may look like metal. 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 behind 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 or is burned, 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 sometimes 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 ammonia will crack and distort polycarbonate plastics.

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