Question about DeLonghi Microwave Ovens

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Delonghi microwave sparking inside

Cardboard cover inside has burnt and it pops and sparks when used

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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MicrowaveSvc
  • 9047 Answers

SOURCE: microwave problem

That panel is probably mics, not netla, though it may look like metal. The job of the waveguide cover is to protect the waveguide (opening) and the magnetron from buildup of food particles and grease. When the grease and food particles build up on and behind the cover, they will carbonize and arc - and maybe even flame up! The solution is to clean it and keep it clean - but if it's too dirty or is burned, it must be replaced. Sometimes it's necessary to remove the cover to clean both sides of it, and to clean the edges of the opening it covers. It is sometimes held in place with a small plastic rivet (or screw) and once that is removed, the cover will slide over a little then drop down. Be VERY careful not to get cut on the potentially sharp edges of the opening, and do not spray anything into the opening. Apply an alcohol-based cleaner (such as the purple kind) and /or gentle scouring powder to a cloth or paper towel and carefully wipe it out, then when it's dry, reinstall the cover and the rivet. I suggest to my customers that they NEVER use any ammonia-based cleaner (like the blue stuff) on a microwave, since the ammonia will crack and distort polycarbonate plastics.

Posted on Apr 23, 2007

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MicrowaveSvc
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SOURCE: Set up Oster Microwave

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.

Posted on Jan 18, 2009

EwingElect
  • 276 Answers

SOURCE: 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.

Posted on Mar 31, 2009

  • 75 Answers

SOURCE: arcing inside microwave

unless you are familiar with these, leave it alone. Over time small particles of food become carbonized inside the oven, hence the electrical display. the solution is to clean it after every use.

Posted on Oct 02, 2009

heatman101
  • 43501 Answers

SOURCE: fire sparks when in use off pad on right side of microwave

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heatman101

Posted on Aug 07, 2010

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3 Answers

My emerson microwave #mw8999rd shoots out fire from a silver piece of cardboard thats on the righthand inside of my microwave oven. whats with that?


There is electrical problem in your microwave heating circuit. This is a fire hazard and you should stop using this microwave and unplug from the outlet. This is not something you can fix and the fuse does not protect your system anymore. The best choice is to purchase a new one and throw this away.

Dec 06, 2011 | Emerson Microwave Ovens

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Frigidaire PLMB209DCB 1200W Microwave. Mfg 2005. Started sparking and loud popping. Scorched cardboard covering. Worth looking at to repair?


No, Your better off buying a new one. Sounds like the Magnetron is acting up and that is the most important and dangerous piece of hardware in the Microwave.

Jun 08, 2011 | Frigidaire GLMV169 Microwave Oven

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My built-in microwave, 2001 build UMC5100ADW emits sparks from behind cardboard panel. Suspect magnatron, or maybe metal deposits in cardboard. Looking for a replacement to fit the frame...


That "Cardboard" item is a wave guide cover and is critical part of the machine.
It is made of mica and needs replacing. The magnetron is OK as long as it does not spark too much or get any foreign items in there.
Replace the wave guide cover.

Feb 27, 2011 | Maytag Microwave Ovens

1 Answer

Sparks in the interior while microwave is on. Sparks come from the right side where there is a "cardboard like" cover over an opening.


IF THIS COVER IS DIRTY IT WILL SPARK. IF CLEANING IT DOES NOT HELP IT MAYBE CRACKED OR THE STIRRER BLADE MAY BE OFF

Jan 13, 2010 | Sharp Microwave Ovens

1 Answer

Arcing inside microwave


unless you are familiar with these, leave it alone. Over time small particles of food become carbonized inside the oven, hence the electrical display. the solution is to clean it after every use.

Oct 02, 2009 | Magic Chef MCD1110ST Microwave Oven

1 Answer

Sparks inside the microwave


remove the round button(s) and remove the cover..clean thoroughly and replace anything thats burnt, if metal clean and paint touchup

Jun 22, 2009 | GE Spacemaker JVM1640SJ Microwave Oven

1 Answer

My Sanyo 1000W microwave is shooting sparks!!!


you need to replace the cavity cover "the cardboard like",the antenna bearing set "the gun barrel like" and the gear motor.If the "gun barrel like" is stuck up because the gear motor is not rotating excessive heat will occur inside the microwave thus burning the cavity cover.

Mar 20, 2009 | Sanyo EM-A5200SW Microwave Oven

1 Answer

Microwave sparks


Quite often this is due to grease or food particles stuck to the inside of the oven or stuck on or behind the waveguide cover.

The waveguide cover 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 cavity metal of the oven is chipped or charred, it will have to be sanded smooth and clean and dried thoroughly.

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 important protection for the magnetron.

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

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

Sep 22, 2008 | Frigidaire FMV156DC Microwave Oven

1 Answer

Mica -sparking and on fire


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

You can order spares here.

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

Jul 08, 2008 | DeLonghi MW 535 Microwave Oven

5 Answers

Popping and shooting sparks


Hi There!
Check behind the "Wave Guide Cover" on the inside cavity. There may be moisture or food residue behind it. Should be a cover that is plastic or Mica. Really strange that it's sparking being new. Also check that you use plates without gold or silver trimmings (Crockery or porcelein). This will also cause sparking. Remember that microwaves will always go to the first organic source in its path. The wave guide cover, if soiled, is very close to the tip of the Magnetron and will therefor result in arcing. Good Luck, JUS004

Feb 26, 2008 | Frigidaire PLMV169DC Microwave Oven

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