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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1 Answer

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

Nov 08, 2013 | Sharp R-1460 Microwave Oven

1 Answer

Brown spots on window of microwave


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

    Jul 29, 2013 | Microwave Ovens

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    Rust or brown spots on window of microwave


    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

    Jul 29, 2013 | Microwave Ovens

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    We can't get our microwave to fully pop the bag of popcorn. If we use the popcorn button it stops before the bag even starts popping. If we preset the time, the same occurs and if we run it until its...


    Always place the bag of popcorn on an upside-down paper plate.

    This allows more microwaves to penetrate the bag from the bottom.

    Also always place food of any kind in the microwave off-center on the tray, NOT in the middle of the tray.

    Not only does it cook more evenly (think of how you stir liquid) but it also prevent the same spot from being heated repeatedly on the glass turntable, which can lead to overheating and breakage.

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

    Sep 06, 2010 | Dacor DMT2420SS Microwave Oven

    1 Answer

    Microwave about 3 years old. Started making a bag of popcorn and after about 1 min. the unit started making a sizzling and grinding sound and a puff of smoke was noticed at the inside right panel opening....


    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 | GE JES1384SF Microwave Oven

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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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    It may be a food placement issue or possibly a bad humidity sensor.

    I always recommend that folks put food off-center on the turntable (not in the center) to assure more even heating.

    It's a stirring action, so imagine how inefficient it would be to stir just by twirling a spoon in the center of your coffee!

    Also, when you put your food off-center, you're not putting it in the same spot every time. That will help prevent repeated heating of the the same spot on the glass, which can lead to weakness and cracking. Microwave popcorn gets hot enough to do that.

    We have the entire service manual at our site if your or a friend want to look that over: http://www.microwavedisplay.com/r820bc_bk_bw_sm.pdf

    If you need a new sensor, you can order Sharp parts from Tritronics at http://www.wehaveparts.com

    Please write back with more details if you need further help.

    We're happy to help and we appreciate your thoughtful rating of our answer.

    Dec 02, 2007 | Sharp R-820B Convection/Microwave Oven

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