Question about Sharp R-1870 Convection/Microwave Oven

1 Answer

Ceiling plate cover has small hole; otherwise works fine.

Sharp Carousel II Over the Range Microwave R-1821 The ceiling has a 4x5 inch plate that has a small burn hole. Is this dangerous? Can I fix (easily)?

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  • skatzman May 26, 2009

    Thank you for your quick and thorough response. I guess by your answer that you feel that the microwave will continue to be safe to use - any thoughts on why this may have happened in the first place?.



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  • Sharp Master
  • 9,098 Answers

Since your waveguide cover is burned, it will need to be replaced. It provides important protection for the magnetron.

It is part # PCOVPA180WRP0 (copy & paste) and you can
order it from Encompass here or you can call them toll-free at 866-779-5835.

In some cases the part is held in place with a rivet. Other times it just slides out of the slot.

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

Posted on May 26, 2009

  • William Miller
    William Miller May 28, 2009

    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.

    As long as the grease in and around the opening is cleaned, and the cover is replaced, it is safe to use.

    The metal edges of the oven behind the waveguide cover can be sharp, so be careful!

    The metal
    behind it should be cleaned with a mild, non-ammonia cleaner.

    If the cavity 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.

    Happy to help.



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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.
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