Question about LG MS-0744Y Microwave Oven

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On the inside top right side of the microwave there was a cardboard cover held on by 4 corner points. The cardboard has fallen out now as it has come unsecured from the points holding it in place. Is it safe to operate it without the cardboard piece?

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That's the waveguide cover.

If your waveguide cover is burned or damaged, it will need to be replaced.

It provides critical protection for the magnetron.

You should be able to get Galaxy parts from the Sears site.

To find helpful exploded view diagrams and get part numbers, you can just enter your full model number at the Sears parts site.

A full Galaxy/Sears/Kenmore model number has 3 digits, a dot, then 8 more digits, such as ###.########


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

Posted on Sep 09, 2010

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this is the waveguide cover it covers the anoide of the magnetron,its not really a good idea to use the unit without it as it does two things it allows the microwaves to pass through it but stop anything from getting onto the magnetron if you know of anywhere that repairs microwaves they may if you take your old cover to they might be able to cut a replacement of if its just fallen out you should be able to slot it back in the corners just sit in the slots in the side panel hope this helps

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What is the mica cover?


Hi, a mica cover is inside the oven cavity, usually on the right hand side or in the roof you will usually see a small cover that looks like it is made of cardboard. It is often held in by one or more screws. It is called the waveguide cover. It is usually made of a material called Mica. Its purpose is to cover the aperture through which the microwaves enter the oven cavity from where they are produced by the Magnetron behind the control panel. It stops moisture and food particles getting into the "workings" of the microwave.

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We have a accuwave microwave oven. Inside there are two cardboard panels that seem to have deteriorated. They are held in by screws. If I knew where to get the cardboard, I think i could replace them. Help...


Those would likely be waveguide covers, which provide critical protection for the magnetron.

You can get parts for many brand and find helpful exploded view diagrams here.

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

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What is the cardboard cover inside my microwave for?


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The problem you are having is that the magnetron that does the heating is shorting out and it needs to be replaced before it damages the inside covering of the microwave. www.mwoparts.com is a good source for magnetrons or other similar sites. To replace is easy enough. Taking the cover off with the power off, you will find it behind and on the top right side of the control panel. It is held in place normally with just 4 screws and two wires with terminals attached to it. So removing and replacing is pretty straightforward. Just be sure all the power is off until you have everything back in place. Good luck.

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No, that is the "waveguide cover".

It provides very important protection for the magnetron.


And always keep it clean according to your manual's instructions.

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

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This is the waveguide cover and it should not be broken. You have to replace it.

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Inside the microwave the piece of cardboard looking rectangle has fallen off. is this dangerous


Yes. This is the waveguide cover, and it needs to be there to protect the magnetron from damage.

The waveguide cover is usually about the size of a playing card and often held in place by a plastic rivet or held in a slotted opening.

It can be fragile, and the metal edges of the oven behind it can be sharp, so be careful!

If your waveguide cover is burned or damaged, it will need to be replaced.

You can often find helpful exploded view diagrams and order parts by entering your full model number here or here.

Please write back with your brand and model number if you need further help.

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

William E. Miller, AS-EET
prototech@usa.net
http://www.microwavedisplay.com

Apr 21, 2008 | Microwave Ovens

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