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Microwave waveguide spatter shield burned through


Which Material is Safe to use for homemade "spatter shield" shielding the microwave waveguide.?

magic chef mcd1311st microwave oven has a "spatter shield" shielding the microwave waveguide from splattered food.

This is blackened in back and a hole burned through it --- caused by occasional arcing of the microwaves (bright light and loud noise)

Magic Chef does not have a replacement part.
I could cut one out the same shape to replace original.

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  • michel_cmp Mar 03, 2009

    repairclinic.com reports





    Part is actually available from mfr (although if you don't fidn the part number they may claim to not have it) but it costs about $18 + shipping. That + cost of new light bjulb + labor involved to install light bulb, + reports of lots of arcing found by others, makes this repair not worth the money. I'm still looking for which materials are used for the waaveguide cover, so maybe we can make a free or cheap replacement.


  • PawPrintBx May 20, 2009

    Question - is this arching harmful? Mine is doing it too and is scares me. Will my microwave blow up?

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THE PART IS CALLED A WAVEGUIDE COVER AVAILBALE FROM REPAIRCLINIC.COM

Posted on Mar 02, 2009

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1 Answer

The metal plate on the right had side of oven has a hole burned in it


That's the waveguide cover (also called a spatter shield) is usually about the size of a playing card and sometimes held in place by a plastic rivet.

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

It provides critical protection for the magnetron.


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.

You can find links to helpful exploded view diagrams and part ordering help here.

I recommend that you bookmark that link to your favorites.

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

Oct 25, 2012 | Emerson MW8168B Microwave Oven

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Is it dangerous to use the microwave without a duct cover


Yes, the waveguide (duct) cover protects the waveguide and the magnetron from damage caused by grease and food particles getting on them.

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 cover and the metal behind it should be cleaned with a mild, non-ammonia cleaner.

If the area is charred or chipped, the area will first have to be sanded smooth and cleaned and dried thoroughly.

If the cavity metal of the oven is cracked or split, you can use a small amount of steel-based epoxy such as JB-WELD to patch the crack or hole.


Once that dries thoroughly, you can sand it very smooth.

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 critical protection for the magnetron.

You can order a new waveguide cover form
Encompass here.

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

Jun 06, 2011 | Sharp R-216 800 Watts Microwave Oven

1 Answer

WHEN YOU TURN IT SPARKS LIKE THERE IS METAL ING IN THE MATERIAL BUT NOTHING IS INSIDE THE MICROWAVE


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 cover and the metal behind it should be cleaned with a mild, non-ammonia cleaner.

If the paint or metal is charred or damaged beyond simple cleaning, the area will first have to be sanded smooth and cleaned 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 critical protection for the magnetron.

It is part number PCOVPA311WRE0 and you can order that from the Sears Parts Direct Web site image-4235112-10659157 or Encompass here.

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

Dec 31, 2010 | Sharp R-425LS Microwave Oven

1 Answer

When I use the it, the microwave sparks in the right hand side of the microwave. What's the problem with my microwave?


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.

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 cover and the metal behind it should be cleaned with a mild, non-ammonia cleaner.

If there is charring which cannot be cleaned off,
the area will have to be sanded smooth and cleaned and dried thoroughly.

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

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

It provides critical protection for the magnetron.

For more help from Emerson visit here or get help using your appliance at 1-800-898-9020. Get help locating an authorized servicer or parts at 1-800-695-0098.

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

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1 Answer

Need to replace the splatter shield on my Emerson microwave, serial # MV899SB. Is it safe to use the microwave without this shield?


Advise not to use. Without the shield cooking grease or other material may splatter into the main microwave components and cause them to fail. Some of those parts can cost over $100.00.

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My viking professional microwave is shooting sparks and caused a burn mark on the inside of the oven wall? Can I fix it or is it shot?


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.

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 cover and the metal behind it should be cleaned with a mild, non-ammonia cleaner.

If the metal of the oven wall is burned or chipped, the area will first have to be sanded smooth and cleaned 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 the cavity metal of the oven is cracked or split, you can use a small amount of steel-based epoxy such as JB-WELD to patch the crack or hole.

Once that dries thoroughly, you can sand it very smooth, then apply paint.

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

It provides critical protection for the magnetron.

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

May 27, 2010 | Viking VMOC205SS Microwave Oven

1 Answer

Sparks inside the microwave when power is turned on


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 cover and the metal behind it should be cleaned with a mild, non-ammonia cleaner.

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

It provides critical protection for the magnetron.

The service manual is here.

Let me know if you need further help.


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

May 15, 2010 | Dacor DMT2420 1200 Watts Microwave Oven

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There is a rectangular cover on the ceiling of the microwave interior that covers what appears to be a vent. It may be called a waveguide cover. Mine burned up and I need to find a replacement


It is the waveguide cover. Some manufacturers call it a splatter shield or spatter shield.

It will need to be replaced. It provides critical protection for the magnetron.

You can find links to helpful exploded view diagrams and part ordering help here.

I'd recommend that your bookmark this link to your favorites.


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

Dec 27, 2009 | Sharp R-930AK Convection/Microwave Oven

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Arcing inside microwave after small fire


Quite often this is due to carbon, grease, or food particles stuck somewhere in the cavity of the oven or stuck on or behind the waveguide cover.

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 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.

You can usually 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.

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As long as the waveguide itself isn't damaged, you should be able to replace the shield without issue... That shield only prevents food from splashing onto the waveguide itself and is not part of the microwave RF protection... Check your local hardware store for touch up paint.. shouldn't matter what brand as long as it contains rust inhibitors.. Good luck...

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