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
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.

Posted by on


2 Answers

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Expert
  • 290 Answers

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.



  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 20 achievements.


    An expert that got 10 achievements.


    An expert that got 5 achievements.

  • Master
  • 1,512 Answers

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.





1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

6 Answers

How do I replace the light bulb in a NEFF H7860B1GB/01 ?

Unplug power first. You need to remve the screwa that hold the bulb cover, access the bulb and replace it, I will wee if I can find a diagram.

Oct 06, 2008 | Neff Microwave Ovens

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

1 Answer

Our microwave works but will not heat anything. what could be the problem or solution without spending alot of money

your magnetron is not sending out its radiation. Magnetron may simply have wires fallen out. Make sure to completely shield everything again, and don't lose any parts. And especially don't work on it plugged in.

Apr 19, 2009 | Welbilt MR95TW Microwave Oven

1 Answer

Arcing in microwave oven (Welbilt MR95TW microwave oven)

the magnetron is what is arcing.. not sure if i would consider it easy enough for a do it yourselfer. there are a few components that need removing. plus the mw needs to be taken down in order to do it.

Mar 04, 2009 | Welbilt MR95TW Microwave Oven

1 Answer

Microwave waveguide spatter shield burned through


Jan 20, 2009 | Microwave Ovens

1 Answer

Need manual

The part numbers were MW-9999-04 OR IB-MR95TW but they are shown to be no longer available.

However, one dealer lists it as being available here.

Good luck.

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

Oct 15, 2008 | Welbilt MR95TW Microwave Oven

1 Answer

Aonde encontro membrana

En Welbilt MR95TW, el número de parte de "keypad" es MW-7450-03.

?Puede no estar disponible? No se seguro.

Tritronics del intento aquí.

Buena Suerte.

Estamos feliz de ayudarle con consejo libre y apreciamos su grado pensativo de nuestra respuesta.

Aug 11, 2008 | Welbilt MR95TW Microwave Oven

1 Answer

XL1800 Microwave Problem

A LOUD ticking sound could very well be a High Voltage Arc. This is usually caused by a breakdown of insulation on High Voltage Wires, or components. It can also be arcing between the door frame and the cavity. Usually where the bottom of the cavity floor meets the door frame. Indication of this will be small areas on the door where it looks like the paint has been chipped off, but if you look close you will see it is small burned marks. Another area is the Splatter Shield located inside and at the top. It looks like a Plastic Cover. It is not plastic, but a fiber material. Grease, and food will get trapped on and under this Splatter Shield. Over a period of time the grease and food particles will break down from being cooked over and over again. They will then form Carbon. Which will Arc when Microwaves are present. Remove Push-Pins holding Splatter Shield. Clean by washing with dish detergent . If burned (arc) spots are still present after washing, replace Splatter Shield or arcing will continue. Once Carbon has burned through, it will continue to burn.

Jan 21, 2008 | GE Spacemaker JVM1640SJ Microwave Oven

1 Answer

Turntable broke need replacement for this model

This is part # MW-7600-07 glass tray available form Tritronics at

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

Dec 01, 2007 | Welbilt MR95TW Microwave Oven

Not finding what you are looking for?
Microwave Ovens Logo

168 people viewed this question

Ask a Question

Usually answered in minutes!

Top Welbilt Microwave Ovens Experts

William Miller
William Miller

Level 3 Expert

9098 Answers

Cindy Wells

Level 3 Expert

5521 Answers


Level 3 Expert

81294 Answers

Are you a Welbilt Microwave Oven Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides