Question about Welbilt MR99T Microwave Oven

2 Answers

Plastic shield card is burning up!

My MR95TW MW oven works fine EXCEPT for a
small card that measures 4 3/16" by 2
15/16". This card shields the power tube,
apparently from any spray of food on the
inside of the oven compartment. The card
is heavy and a little fiberous and has a
hint of being metalic or, more possibly
plastic with some embedded fiber.
This card has started to become scorched
and now a spot has started to cook when
the microwave is on. The spot has gotten
bigger and I can no longer use the oven
because the spot arcs violently. The
center of the spot is now a small hole.
If I did use the oven, more of the card
would burn and, likely a circuit breaker
would trip.
Like other plastics, as more of it burns,
more of it becomes suceptable to being
cooked and burned by the nearby microwave
radiation.
Long Story short, I need a replacement
card. I also need a way to fasten it. I
cut the two plastic rivets that
previously held it in place.

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2 Answers

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It is my understanding that you can't get parts for a Welbilt Microwave anymore. The good news is that you can make one work from another m/w. Take your shield to a local appliance parts dealer and find a shield a little larger than yours. You should be able to cut it to fit your oven using the old one for a pattern. The rivets shouldn't be a problem as Whirlpool, GE, and Maytag all use similar plastic rivets to secure the shields.
Hope this helps.
Thanks, Mike

Posted on Feb 29, 2008

  • Michael  Lindley
    Michael Lindley Feb 29, 2008

    Also, you can prevent this from happening again by removing the cover occasionally and cleaning it with mild detergent and water. Grease and food particles get on the cover and cook to it causing a carbonization that starts the arcing and burning.

    Mike

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Hi there
It is called the waveguide ocover and is made from polycarbonate

Posted on Feb 29, 2008

  • Graeme Ross
    Graeme Ross Feb 29, 2008

    you can generally get a replacement from a parts supplier that stocks Welbilt in your locality. The plastic pin poppers(as I call them can be sourced from the same place. You can get a blank sheet of polycarbonate and cut one out to suit also if you have trouble getting an original. Good luck. Get back to me here is you have any trouble finding the part.



    regards

    Graeme

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