Question about Haier MWG100214TW 1000 Watts Microwave Oven

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Air vent cover broke in half. On our model it was a silver piece of cardboard that covered the air vent. Is this a vital piece? Nothing covered in manual.

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Http://www.repairclinic.com/PartDetail/Waveguide-Cover/1085082 it called a wave guide

Posted on Nov 18, 2010

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1 Answer

Is the mica cover crucial?


sad to say but YES it is critical . .

Mar 25, 2015 | In Microwave Ovens

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

1 Answer

I have a 2004 Sharp R-1214 1100 Watt Microwave and the card like removable 3 x 4 inch plate broke (almost like cardboard) and it covered the vented opening. I don't have a users manual so I don't know the...


That's the waveguide cover you're talking about. It covers the opening in the side of the cooking cavity where the microwaves enter. The oven will work without it, but if you don't have the cover in place, food particles can get into the waveguide and cause problems. You can buy a replacement here.

Feb 07, 2011 | Sharp R-1210 Microwave Oven

1 Answer

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...


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.

Sep 06, 2010 | LG MS-0744Y Microwave Oven

2 Answers

For the sunbeam microwave sgb8901, do you take off the cover over the oven air vent? It's inside the oven on the right hand side- it looks like a rectanglar silver colored piece of cardboard.


I am also having this same problem i dont know the solution yet, but when you figure it out please let me know, or if i figure out i will repost =]

Aug 30, 2010 | Sunbeam SMW750 Microwave Oven

1 Answer

We have a model # mmv1153bas over the range microwave. When heating or cooking items longer than a couple minutes the unit shuts off and remains off for at least 1 hour. It is not the breaker or the plug...


If it goes dead for a while during or after cooking then comes back on, the magnetron is probably overheating and causing the magnetron thermostat to open.

Then when it cools, it closes the circuit and allows power through again.

An overheating magnetron can be due to:
  • operating oven without cover(s) in place
  • wrong magnetron installed in oven
  • an old or otherwise failing magnetron
  • cracked magnetron magnet
  • improper power line voltage (should be 110-125VAC)
  • foods low in moisture (popcorn & bacon, e.g. - add 1/2 cup of water in rear oven)
  • failed or inoperable cooling fan or hood vent exhaust fan
  • deteriorating foam weatherstripping seals in air ducts or on outside cover
  • blocked air vents (dust, animal nest debris, insufficient free air space behind & around oven, etc.)
  • clogged or greasy charcoal filter or grease filter
  • blocked duct in hood vent exhaust
We have a sound clip of what a microwave should sound like when the cooling fan and high voltage section are operating here.

It is vital that the cooling fan runs, or the magnetron will be destroyed. Repeated shutdowns like this are endangering the magnetron, assuming it's not bad already.

Your owner's manual will cover checking the filters and will cover warranty terms. The magnetron may still be covered.

If for some reason you don't have your manual, you can download it here.

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

William E. Miller
prototech@usa.net
http://www.microwavedisplay.com

May 25, 2010 | Maytag UMV1152BAS Microwave Oven

2 Answers

Microwave keeps shutting off


The magnetron is overheating, tripping the thermostat, which shuts off all power until it cools down.

This is usually caused by a blocked air vent, failed internal cooling fan, or failing magnetron.

If it's out of warranty, I'm sure you'll find it's uneconomical to repair, even if you could get parts for this brand.

Good luck.

Dec 26, 2009 | Oster Microwave Ovens

1 Answer

IS MY MICROWAVE NOW UNSAFE TO USE - CAN I DO OWN HOME REPAIR?


It sounds like what you are describing is called a "waveguide cover". You can purchase a replacement from a local parts supplier, or on-line at www.repairclinic.com. It is very easy to replace.

Jun 30, 2009 | Microwave Ovens

1 Answer

What is the cardboard cover inside my microwave for?


It may not be cardboard - it may be a material called mica which is located over where the magnetron is located in the unit. This is a protective cover and if it is what I think it is, do not remove under any circumstances, otherwise you may render the microwave unsafe to use.

Mar 23, 2009 | Microwave Ovens

1 Answer

Cardboard insert


It sounds like you may be talking about the wavegudie cover. Does it cover a square hole in the side or top of the caivty? If so, it is needed. It prevents grease and food debris from getting in the waveguide, which can damage the magnetron. I would refer you to Danby customer service: http://www.danby.com/page.asp?code=5

Aug 24, 2007 | Danby DMW1400 Microwave Oven

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