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Mica board detached while cleaning. what do I do?

Mica board became detached . how do I replace? can microwave still be used?

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6 Suggested Answers

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Posted on Jan 02, 2017

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SOURCE: magnetron tube and mica waveguide cover

Unfortunatey unless the unit is a high end oven by the time you pay for the parts and labor you could probably get a new one. Don't forget if you have to replace these parts already who knows what else is about to happen. I hope this helps you out.

Posted on Nov 26, 2008

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  • 10865 Answers

SOURCE: Cuisinart Microwave oven, 1000 watts

hello. sorry to hear of your problem.

here is the direct link to customer service at cuisinart. If anyone can help u, they can

http://www.cuisinart.com/support.html

let me know how u make out.

Posted on May 28, 2009

MicrowaveSvc
  • 9047 Answers

SOURCE: we have a ge microwave. Sparks came out of

Quite often this is due to grease or food particles stuck to the inside of the oven or stuck on or behind the mica waveguide cover.

The waveguide cover is usually about the size of a playing card and often held in place by a plastic rivet.

Sometimes it is the ceiling of the oven.

Your owner's manual may address this. You can download GE owner's manuals and installation instructions here.

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.

Then you can apply some high-temperature appliance paint, available from places like Wal-Mart or Lowe's.

If your waveguide cover is burned, it will need to be replaced.

You can find helpful exploded view diagrams and order parts by entering your full model number here.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.AC

Posted on Oct 11, 2009

MicrowaveSvc
  • 9047 Answers

SOURCE: microwave mica board sparking

That's the waveguide cover, a critical part of the oven.

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


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.

Then you can apply some high-temperature appliance paint, available from places like Wal-Mart or Lowe's.

If your waveguide cover is burned, it will need to be replaced.

You can just enter your full model number at the Sears parts site.

A full Sears/Kenmore model number has 3 digits, a dot, then 8 more digits, such as ###.########

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

Posted on Oct 30, 2009

  • 1 Answer

SOURCE: Oster: Small hole in Mica Shield - Can't find replacement part

Dear Sir, Dear Sir, We manufacture and supply transparent mica shields(strips & discs) in all sizes/thickness. Please enlist our name in your vendors list and mail us your regular inquiries with sizes/thickness and quantity required. On receipt, we shall quote our best prices. Thanking you, R. Lall Hindusthan Mica Mart, Main Road, Giridih - 815301, India. lallgrd@gmail.com

Posted on Jan 24, 2011

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take it in for repairs or just replace it

Apr 26, 2015 | Sharp Microwave Ovens

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Sharp carousel microwave


Sometimes, bits of food get behind the microwave generator mica cover and cause this EXACT problem they short out the microwave energy and spark. . It is NOT broken but DONT let this happen for more than a few seconds. !!!! You will see the Mica (looks like plastic) cover from inside the oven and will be on one of the sides.It looks oblong normally, It is actually transparent to Microwaves and is how they get from the generator in to the oven. Give it a real good clean around the edges or better still take it out to clean. and it should be fine

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Why does my microwave arch at the wave guard


Typically most arcing in a microwave is caused by food splatter. A microwave cannot tell the difference between what is on a plate or on the wall or ceiling. Every food particle in a microwave will continue to cook until it turns to carbon and will attract the microwave energy and focus it to that spot and the unit will arc. Thorough cleaning of the entire microwave cooking cavity and removal of any burn or soot mark will commonly stop the arcing. If your microwave has a painted cavity, you can even use some very fine sand paper to remove any burn mark. Always cover what you are warming and really keep the inside of the microwave clean. If your wave guide cover is made out of the Mica board, and If it has gotten wet from cleaning or from splatter, it must be replaced. You can either order a new one or order a sheet of the mica board and cut out a new one yourself. If the microwave is arcing in the waveguide, generally the unit will need to be replaced. One quick test to see if the unit will work is to remove the bad cover and place a small container of water in the unit, run the machine of a minute or so and see if it still arcs. If it does, the arcing is in the waveguide area, if not it may have just been a problem with the cover. You can run the unit without the waveguide cover in place, it is only there to prevent splatter from getting into the waveguide, so removing it to test the unit is ok. If the area inside the wave guide shows signs of soot and arcing. You can try to wipe that out with some alcohol or lacquer thinner and then try it again. Good Luck.

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Problem with split light brown mica cover ?


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My Microwave is arcing due to its demaged Mica sheet. Can I replace it with any other ordinary Mica sheet cut to its original size & fit in its place? Will it work? Or are there special Mica sheets...


Hello.

Yes you can buy mica sheets made for microwaves at appliance repair/parts shops.Scissors work well for this. A razor knife might be needed for notches etc. If so, several shallow cuts work better than trying for one deep one, as your not as apt to slip. I usually put the leftover material in a plastic bag and tape it to the bottom of the unit so I could find it the next time.

Hope this helps you.

fil

Mar 06, 2011 | Microwave Ovens

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Oster: Small hole in Mica Shield - Can't find replacement part


Dear Sir, Dear Sir, We manufacture and supply transparent mica shields(strips & discs) in all sizes/thickness. Please enlist our name in your vendors list and mail us your regular inquiries with sizes/thickness and quantity required. On receipt, we shall quote our best prices. Thanking you, R. Lall Hindusthan Mica Mart, Main Road, Giridih - 815301, India. lallgrd@gmail.com

Feb 01, 2010 | Sanyo EM-S5002W Microwave Oven

1 Answer

Microwave mica board sparking


That's the waveguide cover, a critical part of the oven.

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


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.

Then you can apply some high-temperature appliance paint, available from places like Wal-Mart or Lowe's.

If your waveguide cover is burned, it will need to be replaced.

You can just enter your full model number at the Sears parts site.

A full Sears/Kenmore model number has 3 digits, a dot, then 8 more digits, such as ###.########

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

Oct 29, 2009 | Kenmore Microwave Ovens

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I need a microwave guide cover for model mw8115ss


Buy a sheet of mica. It's cheap and easy to work with. Draw and cut a new cover from a sheet and replace the damaged one. There's a example of how cheap mica is (I just used a sheet like that today on my Miele microwave).

http://www.leiritronica.com/linhabranca/product_info.php?products_id=2587

Don't try punching holes in mica, always drill them gently. It will easily flake.

Mar 10, 2009 | Emerson MW8102SS 1100 Watts Microwave Oven

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Smoke Coming from inside of Microwave even when warming for 10 seconds


Proberly wave guide cover at side it can get grease behind it,And when you used it with small load it tried to cook it and then burned the mica cover,Take mica cover off and try it without it to seeif problem resolved if ok,New cover can be obtained if req.Regards grandadfixer

Oct 10, 2008 | Thermador MBBS Microwave Oven

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Waveguide cover for Kenmore microwave


Try replacing the screws with larger ones. Maybe you ordered the wrong piece, if your microwave comes with a mica cover (A fine, square piece of mica) and you received a plastic one, you will need to get the right piece or adapt the one you received.
You can get the mica cover on any microwave service.

Feb 16, 2008 | Microwave Ovens

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