Question about Sharp R-820B Convection/Microwave Oven

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PAINT DAMAGE INSIDE MICROWAVE CAVITY.

DUE TO POPCORN BAG INFLATING AND PUSHING THE RACK AGAINST THE SIDE OF THE UNIT, I HAVE TWO VERY SMALL SPOTS(SIZE OF PENCIL LEAD) IN THE CAVITY. IS IT SAFE TO CONTINUE USE AND CAN I USE APPLIANCE TOUCH-UP OR SOME OTHER KIND OF PAINT TO COVER THE SPOTS?

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  • Bernadette Jan 19, 2013

    what kind of sandpaper do i need to smooth out my microwave

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  • Sharp Master
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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 it's allowed to stay that way, it can arc, which will greatly accelerate the charring & rusting processes.

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

Posted on May 26, 2009

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I have a Sharp Carousel Microwave R-1460A. The disk on the ceiling, opposite the warming plate and about the same size, has severe burn marks (probably from food splatters). Any idea what that part is


see this indication and fix it. God bless you
  1. Waveguide coverSparking and arcing in a microwave can be caused by a damaged waveguide cover. Try removing the waveguide cover to see if the problem persists. Once removed, the waveguide cover can be inspected for burns, which will indicate if this is the issue. If the waveguide cover is burnt or will not stay in the proper spot it will need to be replaced.
  2. Cavity/Rack supportIf sparking or arcing in your microwave is near a rack support, any exposed metallic area can be covered with a microwave cavity support. It is also recommended to replace the rack supports in this situation to ensure the issue is resolved.
  3. Cavity paintIf sparking or arcing in the microwave is visible on the side walls, the paint covering the metallic areas could have worn off or chipped. This can possibly cause pitting in the side walls or ceiling. If this is the case, it can be repaired with microwave cavity pain

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follow this test and fix it. God bless you

  1. Waveguide coverSparking and arcing in a microwave can be caused by a damaged waveguide cover. Try removing the waveguide cover to see if the problem persists. Once removed, the waveguide cover can be inspected for burns, which will indicate if this is the issue. If the waveguide cover is burnt or will not stay in the proper spot it will need to be replaced.
  2. Cavity/Rack supportIf sparking or arcing in your microwave is near a rack support, any exposed metallic area can be covered with a microwave cavity support. It is also recommended to replace the rack supports in this situation to ensure the issue is resolved.
  3. Cavity paintIf sparking or arcing in the microwave is visible on the side walls, the paint covering the metallic areas could have worn off or chipped. This can possibly cause pitting in the side walls or ceiling. If this is the case, it can be repaired with microwave cavity paint.

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Arcing will occur if you have any metal inside the microwave, or if the powder paint on the inside has been damaged. If the paint is damaged dispose of the microwave

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test this steps and fix it. God bless you

  1. Waveguide coverSparking and arcing in a microwave can be caused by a damaged waveguide cover. Try removing the waveguide cover to see if the problem persists. Once removed, the waveguide cover can be inspected for burns, which will indicate if this is the issue. If the waveguide cover is burnt or will not stay in the proper spot it will need to be replaced.
  2. Cavity/Rack supportIf sparking or arcing in your microwave is near a rack support, any exposed metallic area can be covered with a microwave cavity support. It is also recommended to replace the rack supports in this situation to ensure the issue is resolved.
  3. Cavity paintIf sparking or arcing in the microwave is visible on the side walls, the paint covering the metallic areas could have worn off or chipped. This can possibly cause pitting in the side walls or ceiling. If this is the case, it can be repaired with microwave cavity paint.

Read more: http://www.appliancepartspros.com/repair-help/microwave-repair-help.html#10#ixzz2aaus0Uj3
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follow this steps and fix it. God bless you

  1. Waveguide coverSparking and arcing in a microwave can be caused by a damaged waveguide cover. Try removing the waveguide cover to see if the problem persists. Once removed, the waveguide cover can be inspected for burns, which will indicate if this is the issue. If the waveguide cover is burnt or will not stay in the proper spot it will need to be replaced.
  2. Cavity/Rack supportIf sparking or arcing in your microwave is near a rack support, any exposed metallic area can be covered with a microwave cavity support. It is also recommended to replace the rack supports in this situation to ensure the issue is resolved.
  3. Cavity paintIf sparking or arcing in the microwave is visible on the side walls, the paint covering the metallic areas could have worn off or chipped. This can possibly cause pitting in the side walls or ceiling. If this is the case, it can be repaired with microwave cavity paint.

Read more: http://www.appliancepartspros.com/repair-help/microwave-repair-help.html#10#ixzz2aaus0Uj3
http://www.appliancepartspros.com

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see this steps and fix it.God bless you

  • Waveguide coverSparking and arcing in a microwave can be caused by a damaged waveguide cover. Try removing the waveguide cover to see if the problem persists. Once removed, the waveguide cover can be inspected for burns, which will indicate if this is the issue. If the waveguide cover is burnt or will not stay in the proper spot it will need to be replaced.
  • Cavity/Rack supportIf sparking or arcing in your microwave is near a rack support, any exposed metallic area can be covered with a microwave cavity support. It is also recommended to replace the rack supports in this situation to ensure the issue is resolved.
  • Cavity paintIf sparking or arcing in the microwave is visible on the side walls, the paint covering the metallic areas could have worn off or chipped. This can possibly cause pitting in the side walls or ceiling. If this is the case, it can be repaired with microwave cavity paint

  • Read more: http://www.appliancepartspros.com/repair-help/microwave-repair-help.html#10#ixzz2aSjW5F9U
    http://www.appliancepartspros.com

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    follow this steps and fix it. God bless you


  • Waveguide coverSparking and arcing in a microwave can be caused by a damaged waveguide cover. Try removing the waveguide cover to see if the problem persists. Once removed, the waveguide cover can be inspected for burns, which will indicate if this is the issue. If the waveguide cover is burnt or will not stay in the proper spot it will need to be replaced.
  • Cavity/Rack supportIf sparking or arcing in your microwave is near a rack support, any exposed metallic area can be covered with a microwave cavity support. It is also recommended to replace the rack supports in this situation to ensure the issue is resolved.
  • Cavity paintIf sparking or arcing in the microwave is visible on the side walls, the paint covering the metallic areas could have worn off or chipped. This can possibly cause pitting in the side walls or ceiling. If this is the case, it can be repaired with microwave cavity paint

  • Read more: http://www.appliancepartspros.com/repair-help/microwave-repair-help.html#10#ixzz2aSjW5F9U
    http://www.appliancepartspros.com

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    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!

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    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.

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    Arcing inside and there is now a small hole on the panel side. Is this fixable?


    Hi,

    It looks like there's lightning (arcing) inside my microwave When you see arcing inside your microwave, it's because of food or liquid left in the cavity or on the wave-guide cover:

    • If the wave guide has any burn spots, replace it and clean the unit well.

    • If the cavity has any burn spots, spot-sand it smooth and touch it up with microwave interior paint.

    Note… If there are any burn holes in the cavity, don't use the unit-seek help from a qualified appliance repair technician.

    Thanks for contacting Fixya

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    ELECTRICAL POPING SOUNDS


    Hi there - I assume you have a rack in the Microwave. What happens is the rack due to putting something in and out of the Microwave some times wears against the back wall of the cooking chamber. As this happens it wears through the paint and exposes the metal casework.

    You then get microwave arcing between the metal rack in the microwave and the cooking compartment casing which gives that spitting popping sound. I would say get some white model paint and paint over the scorched spot (as long as its not gone so far as to wear a hole in the case work).

    Wait for it to dry and stick the rack back in and try again to warm up a cup of coffee or something and see if it stops.

    Also if you pull the grill slightly forward in the holders towards the door and test it you may notice that it doesn't pop as much so I would paint it and pull the grill forward and see if you still get the issue.

    Best of luck.


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