Question about Sharp R-230 Microwave Oven

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There is a tear in the waveguide.Is this dangerous?

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Yes yes yes .its dangerous. You will have to replace the waveguide cover. or just cut to size using your old waveguide as a template. ------ You can oder replacement wave guide cover from the link below. Just click on the link:--- http://shop.ukwhitegoods.co.uk/Microwave%20Spare%20Parts/Universal%20Microwave%20Items/RL75101%20Universal%20Microwave%20Waveguide%20Cover.html --------- There is pone more link from where you can order the parts.Please click on this link:--- http://www.partstore.com/Sitemap/Sharp/Sharp/Carousel+microwave+parts.aspx --------- Its simple to replace the cover; it just slides right underneath the tabs inside. -----------

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Posted on Sep 27, 2010

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Posted on Jan 02, 2017

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How to fix a KitchenAid sparking Microwave


Get rid of it and buy a new one. This sounds like a dangerous item to continue to use.

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Jan 29, 2017 | KitchenAid Microwave Ovens

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Dacor DMT2420S


That would be your waveguide cover. If damaged or discolored, the waveguide cover has been damaged by heat and must be replaced.

It protects your waveguide and magnetron from arcing due to grease and food particles.

The area of the waveguide behind the waveguide cover should be clean, and if rust or flaking is present it must be sanded, then repainted with high temperature appliance paint.

For Dacor model DMT2420S, the waveguide is part number 66345 and you can get it from The Pros here for $11.07 (subject to change).

The service manual is at my site here: http://www.microwavecontrol.com/dmt_2420_sm.pdf and the part list is here: http://www.microwavecontrol.com/dmt_2420_parts_list.pdf.

Feel free to e-Mail me at pupista@gmail.com if you need more free advice.

Sep 25, 2016 | Dacor Microwave Ovens

1 Answer

Can you replace the waveguide in a model NN-SN756B Panasonic microwave oven?


Generally, there are no user serviceable parts in a microwave oven due to the dangers of exposing yourself to microwave radiation. There are special screws that can only be removed by technicians who have the right tool.

However, I did find this.

Microwave Oven Repair Guide Replace wave guide cover

Oct 28, 2015 | Panasonic Microwave Ovens

1 Answer

Kenmore ken gtal17 waveguide cover tear


safety first have it repaired properly to be safe

Aug 18, 2012 | Microwave Ovens

1 Answer

Is it dangerous to use the microwave without a duct cover


Yes, the waveguide (duct) cover protects the waveguide and the magnetron from damage caused by grease and food particles getting on them.

The waveguide cover (also called a spatter shield) is usually about the size of a playing card and often held in place by a plastic rivet.

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.

If the area is charred or chipped, the area will first have to be sanded smooth and cleaned and dried thoroughly.

If the cavity metal of the oven is cracked or split, you can use a small amount of steel-based epoxy such as JB-WELD to patch the crack or hole.


Once that dries thoroughly, you can sand it very smooth.

Then you can apply some high-temperature appliance paint, available from places like Wal-Mart, Lowe's or Builder's Square.

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

It provides critical protection for the magnetron.

You can order a new waveguide cover form
Encompass here.

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

Jun 06, 2011 | Sharp R-216 800 Watts Microwave Oven

2 Answers

Microwave is 6 months old. clock won't light up. when i try to set cooking time the inside starts making a clicking sound and a light flashes in the top right inside


Sounds like the waveguide cover has been contaminated with food that has carbonised and burning.
Call a Whirlpool repair agent and get the waveguide cover replaced.
They need to be kept clean and leaving the door open after cooking helps to dry the moisture out in the cavity. Making it last longer.

Jan 23, 2011 | Whirlpool MH1170XS Microwave Oven

1 Answer

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

1 Answer

Louder than normal noise when using and bad 'burning' smell


You need to stop using your microwave if it's burning. This is a common symptom of a blown magnetron. Using it in it's current condition is not only dangerous, but it will further damage other components in the high voltage circuit and/or waveguide. In many circumstances, damaging the waveguide renders a microwave non-repairable. A new magnetron will cost you around $100 if you wish to repair this yourself. NOTE: I would not recommend working in or around the high voltage circuitry unless you absolutely know what you are doing. Do not attempt to take any live voltage measurements or operate the oven with any of the protective covers removed or interlocks defeated. Voltage potentials of over 13,000 volts exist and are potentially dangerous. I hope this helps you.

Feb 20, 2008 | GE JVM1660 Microwave Oven

1 Answer

Maytag Rangehood Microwave Loud Humming


Sounds like you just fried your magnetron. Normally when they go bad, they make a very loud noise like what you described. The smell concerns me because you may have ruined the waveguide as well. If the magnetron burns through the protective painted surface of the waveguide, the waveguide is ruined. In most microwave ovens this means replacing the entire unit because the waveguide is not replaceable. Putting a new magnetron in a damaged waveguide will result in the same arcing and eventual failure. In addition to the magnetron, the following components are part of the same high voltage network: HV Transformer HV Diode HV Capacitor Magnetron Thermal Cut-Out Any one of these components could have also been damaged. I DO NOT recommend taking any voltage measurements inside the HV network. Potentials of over 4000 volts can be reached and make it very dangerous for the do-it-yourselfer. Taking resistance readings with the unit unplugged is strongly encouraged. If you decide to pursue a repair, inspect the magnetron tip and inside of the waveguide first. If the magnetron is melted and/or there are burn marks inside the waveguide, a new microwave may be a in order. This actually may be a better option than an expensive repair. I hope you find this advice helpful.

Jul 31, 2007 | Whirlpool GH4155XP Microwave Oven

6 Answers

Runs but makes a super load pop sound with flame


It sounds like you're saying a flame and pop came out of the area where the internal electronics are? If that's the case, then I would suspect a failed high-voltage transformer, bad magnetron or that another high-voltage component is arcing, like maybe damaged wiring, but that's rare unless... ... I hate to suggest it, but maybe a "critter" has made his way into the high-voltage section! That can cause some really "interesting" effects! If the flame and pop are coming out of the cooking cavity, then it could be food debris or grease underneath the waveguide cover or in the waveguide. I would say the likliest cause is a failed HV transformer. If it's still under warranty, I'd call Sears right away to verify that. If it's not under warranty, you may want to pull it from the wall yourself and take it in to Sears or another shop yourself. You'll probably save about $50 as opposed to letting them come out to the home to service it.

Oct 04, 2006 | Kenmore 62642 / 62644 / 62649 Microwave...

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