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What is the microwave feed guide for, it looks like a flimsy piece of card that would easily get dirty

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WHY DID MY MICROWAVE OVEN BURST INTO A FLAME AFTER 30 SECONDS ON HIGH POWER? TWICE. LMV1314B bought Jan. 2008


Hi,
Actually you don't need to replace the microwave, you just need to replace the carboard piece or "wave guide" and replace the magnetron inside the microwave behind the cardboard piece. The magnetron will commonly arc out to the wave guide if the wave guide gets something that splatters on it. The repair isn't cheap because the magnetron costs about $200 and the wave guide is another $30 or so, but if you replace both these parts you should be good to go again.
The magnetron usually have 5 years warranty, however you need to speak with manufacturer itself for the same.
Let me know,if needed further assistance.
Hope i helped you.
Thanks for using ' Fixya ' and have a nice day!!

Sep 23, 2011 | LG LMV1314 Microwave Oven

1 Answer

There is a pad on the interior right side that is made out of cardboard type of material. Seems very flimsy. Does this stay in there? What is its purpose?


That piece is called the waveguide cover. In many ovens it's made of plastic. In others, like yours, it's a mica sheet and does seem rather like cardboard, and is brittle. It's there to cover the hole where the microwaves enter the cooking cavity, so no food particles or grease can get in. The oven can work without the cover, but it's potentially unsafe. Arcing and overheating can result, and the magnetron tube (the microwave source) can be damaged, if food buildup occurs in the waveguide.

Replacement waveguide covers are available for many models, and you can get pieces to make your own if you can't find the exact part. Search the Web for "<your make and model here> waveguide cover". Sears parts and Appliance Parts Pros are good places to start looking, and you may be able to find a suitable replacement if you have an appliance parts store in your area.

Sep 10, 2011 | Microwave Ovens

2 Answers

Arching and sparking when run empty


microwave should never run empty. the reason is that the microwaves needs to heat something. more info : google - how microwaves heat food?

Dec 26, 2010 | GE JES1851 Microwave Oven

1 Answer

Sparks coming from inside of oven body


Microwave ovens usually have a small panel inside that looks like a piece of card. This can sometimes decompose and cause sparking . If so then you can replace this easily. You should be able to get one quite cheap.
pete

Dec 15, 2010 | GE Spacemaker JVM1540 Microwave Oven

1 Answer

Crackling noise, like something is shorting out, came from GE Spacemaker XL1800 JVM1850WF001. I immediately turned it off but I don't know where to start to figure out the problem.


If the interior is dirty or the wave guide dirty or worn out it can cause this. The wave guide is on the interior and looks like a piece of stiff paper. Clean it carefully as it's delicate.

Dec 08, 2010 | GE Microwave Ovens

1 Answer

The top plate inside the microwave sparks while cooking. We checked the dish we were cooking with, the papertowel that covered the dish. What could be causing this?


The wave guide could be dirty or damaged. Dirty oven interior can also cause sparking. The wave guide is probably not dirty if it's not on the interior of the oven . Some are behind the interior wall .

Mar 28, 2010 | Whirlpool MH7140XF Microwave Oven

1 Answer

Microwave will not heat. Can't pop popcorn or even fry a piece of bologna jeb1860dmvv Microwave will light up turn table turns as if it on but there is no heat.All functions seem normal.


Sounds like the magnetron has failed. There are some high voltage circuits that feed the magnetron and you can potentially get hurt if you don't know what you are doing. Would recommend you have it serviced by a professional if you want it fixed, otherwise look for a new one since the cost of repair can come close to the price of a new microwave oven.

Jun 13, 2009 | General Electric Microwave Oven

1 Answer

Can't clean microwave oven door


you can change this part easily... if you want a fresh look, or using a degreaser that is available in home depot...
cheers

Nov 24, 2008 | Microwave Ovens

1 Answer

Gold Star convection microwave model ER-930C


If you have a sentimental attachment to this microwave (lots of the older ones feel so much more "quality" than the flimsy throw away versions offered today), then you might want to pick up a service manual to diagnose your issue. Here is one being offered and it has a troubleshooting guide. http://www.analogalley.com/osccart/index.php?manufacturers_id=61

Jan 12, 2008 | Goldstar Microwave Ovens

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