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There is a little brown mica cover in my microwave that has broken in half. Do I need this and where can I get one?

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  • Barrett Palumbo
    Barrett Palumbo Dec 29, 2010

    Sorry to read about your issues.
    But you really need to give us the make and model, of your unit. It kinda helps us to help you. and a more detailed explanation, of whats is going on..

  • martinmdq
    martinmdq Aug 19, 2012

    I am having the same issue. I do not what to do.

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6 Suggested Answers

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  • 2 Answers

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Posted on Jan 02, 2017

Richie_asg1
  • 1036 Answers

SOURCE: sparking inside. Little mica cover

Hi there.

Unfortunately this is how most microwaves die. The Magnatron that generates the microwaves (behind the cover) overheats and charrs the insulation between the high voltage contacts.

You would be best to obtain a new unit or have it repaired,

Spares are usually available, but sometimes it is not economically feasable.

Hope this helps.

Posted on Jun 14, 2008

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

  • 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

  • 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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1 Answer

In manual page EN-8 It says "Do not remove the light brown Mica cover that is attached to the oven cavity to protect the magnetron. What is a magnetron and what mica cover are they talking about


The Magnetron is the high-power device that produces the microwave energy that is directed into the microwave oven cavity by means of a waveguide, which is a metal boxlike duct that transmits the microwave energy from the magnetron to the oven cavity. The Mica cover is a microwave-transparent film that covers the open end of the waveguide where it enters the oven cavity. It is there to prevent dust, dirt, and other things from getting into the waveguide. If that happens, the waveguide can develop electrical arcing, which will destroy it and the magnetron.

Dec 16, 2015 | In Microwave Ovens

1 Answer

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

Aug 25, 2014 | Sharp Carousel R530EST Microwave Oven

1 Answer

Problem with split light brown mica cover ?


I would bin it. Playing around with microwaves can be LETHAL.

May 08, 2014 | Goodmans GS200 Microwave Oven

1 Answer

I get an occasional spark when microwave is in use


Presuming that you have iliminated the possibility of any metal objects that are not meant to be in the machine being in there (and this includes dishes and other items with silver or gold leaf on them, which WILL spark and burn!) then take a look inside the oven its self. You will find a waveguide cover. It is usually a strange flakey silvery plastic/card like material called Mica and is usually on the same side of the microwave wall as the control panel (So if the picture on this thread is accurate, I will guess the Mica cover is on the right hand wall inside as you look at the machine from the front) . Over time, the magnatron (the thing that creates the microwave energy) will often burn a hole through the mika, or cause a dark brown or black burn mark in it. If this cover is even slightly damaged then it may well cause sparking inside the machine. These covers are designed to be removed and you can buy replacements for them from electrical stores.

Aug 12, 2011 | GE Advantium SCA1001HSS Convection...

1 Answer

Sparks are coming from behind the little revovable plate inside the oven.


these covers are made of a mica material; and tend to get grease-soaked from food splatter. this is where the microwaves pass through. if cover is burned, you will need to replace and clean greasy mess underneath. hopefully, the magnetron is not damaged.

Aug 06, 2011 | Jenn-Air JMC9158AA Convection Microwave...

1 Answer

Cardboard cover is broken in the microwave>


The cover is the waveguide cover and must be replaced to keep the magnetron free from steam and food particles. Your local microwave repair shop can do it quite easily or you may be able to buy a mica cover online.

Mar 28, 2011 | Danby Microwave Ovens

1 Answer

What is the mica cover?


Hi, a mica cover is inside the oven cavity, usually on the right hand side or in the roof you will usually see a small cover that looks like it is made of cardboard. It is often held in by one or more screws. It is called the waveguide cover. It is usually made of a material called Mica. Its purpose is to cover the aperture through which the microwaves enter the oven cavity from where they are produced by the Magnetron behind the control panel. It stops moisture and food particles getting into the "workings" of the microwave.

Mar 09, 2011 | Cuisinart CMW-100 Microwave Oven

1 Answer

Husband was using it last night (jenn-air jmc700)it's making a rough sound, there is a big brown kinda burn mark that extends from that small little piece on the right side that looks like it encloses...


It's arcing due to the food being attached to the mica plate. It needs to be serviced by an authorized technician. Don't use it or you can break the microwave valve.

Nov 03, 2009 | Jenn-Air JMC7000 Microwave Oven

1 Answer

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

1 Answer

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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