Question about Sharp KB-4425LW Insight Pro Electric Range, White, Active LCD Touchscreen for microwave and lower oven, Electric glass ceramic cooktop, Microwave Drawer Sensor, 1.0 cu. ft. 1000W, Automatic Opening Drawer, 3.6 cu. ft. Oven capacity, True European Convectio

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Can your microwave work without mica cover?

While using started sparking. At times it has actually caught fire. Can the cover be removed and still use oven?

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It can be, but it's not recommended. Food can splatter and get into the waveguide and cause problems. Also if you reach in there with your finger right after the microwave stops, you can get a severe shock (until the capacitor discharges, usually in about a minute). Also the edge is sharp.

Posted on Nov 27, 2014

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Had a power surge, microwave started to smoke. Reset power in the house and microwave works fine. 1) Is there anything I should be concerned about? 2) If I continue to use it, can it catch on fire?


Microwave ovens have a lot of safety devices built in. Not sure why or where it was smoking from but without removing the cabinet and having a visual look for something burnt, it would be impossible to say. If the machine is now working OK, ??? who knows. All I can say is that for the next few future uses of the machine, I wouldn't leave it unattended in case there is something that has failed. Chances of fire in a microwave is possible but this is usually something that you are cooking that catches fire, not the machine itself. I have seen the mica cover plate burn in the cooking compartment. It may be that ? Its a small squarish plate that is usually on the side of the oven compartment. It stops food etc and splatters from going into whats known as the waveguide tunnel (The part where the microwaves come out) On some machines, this cover may be plastic. Have a close look inside the oven compartment for a cover that has burn marks or discoloration.

Apr 13, 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

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Replacement mica cover for sanyo d95535n microwave


Hi there micro
There are things that the microwave does not like. One of them is aluminium or metal for that matter.
You can buy plastic hoods or just cover the plate with plastic film not forgetting to pierce the film in several places in order to let the steam escape.
all the best
Kolbrun

Apr 09, 2012 | Sanyo Microwave Ovens

1 Answer

When I turn on the microwave to heat anything, it makes a sizzling, cracking noise, and kinda looks like a fire, on the right hand side, as you are facing the microwave.... There is a screen area with the...


It sounds like what you are talking about is an issue with 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.

if your microwave is working ok and behaving itself then there is nothing to worry about, but there may be one of 3 problems that may arise which should be rectified.

1. Its fallen off.

2. It has a hole in it.

3. It is arcing or sparking during use.

In any eventuality it should be replaced. If it has fallen off or got a hole in it then there is the risk of food or moisture getting into the waveguide which will reduce the efficiency of the oven. If it is arcing or sparking then continued use will damage other components in the microwave including the oven cavity which could be costly to rectify.

If there are any issues with your waveguide cover it should be replaced. When new the mica sheet is rigid and firm. Over a period of time it absorbs moisture and gets food splatters on it. It then becomes soft and flexible. The cover can be replaced either with a suitable replacement made by the manufacturer of the microwave or if the old cover is in good enough shape to be used as a template, blank sheets of mica can be purchased and cut to fit.

Jul 07, 2011 | Dacor DMO24SS Microwave Oven

1 Answer

Fire flashes from the small right side panel inside the microwave


This is usally a problem with moisture that got between the layers of a mica coverplate. If the burned bubble is in a cover that looks like a hard plastic or fiberglass piece, then you need to replace that mica cover. The cover is usally 3 to 6 inches square or rectangular. Microwaves will arc between the layers if there is moisture in the mica. Good Luck

Dec 11, 2009 | Washing Machines

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

5 Answers

Metallic-like cardboard insert inside microwave is crumbling???


That piece is called the waveguide cover. Emerson calls it a spatter shield. Behind it is the hole where the microwaves enter the oven. Its job is to prevent food spatters from getting into the microwave source, and it's not a good idea to run the oven without it.

The cover is usually held in place by a plastic rivet that pulls out. I couldn't find the part number for the cover used in your model. But here is a link to a parts place that has several covers available:

http://www.a-1catalog.com/wavandstirco.html

If one of the covers shown looks like yours you can order it. Another possibility is to contact Emerson at 800-695-0098. This is the number they give to locate authorized servicers near you, and you might be able to order a replacement cover through them.

Hope this has helped. If so, please take a moment to rate the solution. Thanks for asking here!

Mar 03, 2009 | Emerson MW8102SS 1100 Watts Microwave Oven

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Sparking roof of my miele M613G microwave


these ovens are favourite for this, it is something to do with the stirrer blades. the top casing can be removed and replaced

Feb 23, 2009 | Miele M613GSS 800 Watts Convection /...

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Popping and shooting sparks


Hi There!
Check behind the "Wave Guide Cover" on the inside cavity. There may be moisture or food residue behind it. Should be a cover that is plastic or Mica. Really strange that it's sparking being new. Also check that you use plates without gold or silver trimmings (Crockery or porcelein). This will also cause sparking. Remember that microwaves will always go to the first organic source in its path. The wave guide cover, if soiled, is very close to the tip of the Magnetron and will therefor result in arcing. Good Luck, JUS004

Feb 26, 2008 | Frigidaire PLMV169DC Microwave Oven

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