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Microwave making arching noise mcm990st

Arching nioe also continues after unpluged

Posted by Anonymous on

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6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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MicrowaveSvc
  • 9085 Answers

SOURCE: arching microwave oven

The area that has arced needs to be cleaned thoroughly, and if the paint is affected, it will need to be sanded smooth and cleaned with alcohol.

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

If the rack support is charred or melted, it will need to be replaced. It's best to replace them as a set.

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.

Posted on Sep 06, 2008

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MicrowaveSvc
  • 9085 Answers

SOURCE: Arching when in use

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.

In some models it is a larger stirrer cover type made of thicker plastic in the ceiling of the oven.

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.

If the magnetron is damaged, it will have to be replaced, too.

If you or someone you know decide to look into it, we have critical safety information and disassembly information at our site, and our link is at our listing here on FixYa.

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

There may also be a "mini-manual" hidden inside the unit behind the control panel or hidden on the left side behind the grille, which is very helpful when troubleshooting & testing.

If your brand and model are not shown, Please reply back with your brand and model number so we can help you.

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

Posted on Sep 25, 2008

  • 958 Answers

SOURCE: arching inside microwave

un plug it right away.

there are carbon deposit near the wave cover. the arching is coming from the magnetron to any exposed metal inside the unit or any carbon deposit since carbon is already conductive, it is sensing it as a metal.

remove and clean the interior of the microwave. polished and paint all exposed metal that you will find in the interior.

then test again the unit.

tnx 4 using fixya,

drcool

Posted on Sep 30, 2008

MicrowaveSvc
  • 9085 Answers

SOURCE: error code f9 model 721.63764

Very useful information. Thank you.

You can find exploded views and order parts by entering your model number at the Sears parts site.

The part number for this model's inverter is 6871W1S019AR and Sears charges $92.49 for it.

There should also be a "mini-manual" hidden inside the unit behind the control panel or hidden on the left side behind the grille, which is very helpful when troubleshooting & testing.

It often features a parts layout to help you find things.

Hope this helps! Good luck and be safe.

Posted on Oct 21, 2008

SolutionGuy
  • 331 Answers

SOURCE: Microwave Upper Stirrer Motor

What up, Roller?
The straight up answer to your question is "Yes, you can continue using the oven without the stirrer motor". Here's the thing, though... the stuff you put in it won't heat evenly. I'm talkin' about big stuff; turkey, ham... stuff like that. And if you've utilized the defrost function in the past, you can forget about that now. But if you use it to heat up a dinner plate or a cup of coffee, you're good to go.

Another thing. You're motor is not the problem, it the coupler that connects to the motor shaft that has given out on you. That's the thing that connects to the motor shaft. You can see it, by lifting the glass outta your MW... see that little plastic drive gear there? It has three spokes on it. That's the gremlin in the machine.

The part number for it is WB06X10144. You can call a local appliance parts place or you can get one online (<---just type in the part number to a search engine).

Simple to replace... pull the old one out and slide the new one into place. See? Easy! Oh yeah, then you have to plug the motor back in, but hey! You already know how to do that! Cool!

Don't forget to rate my solution, OK? Show me some FixYa love, Roller!

SG
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Posted on Jun 03, 2009

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What to do when the microwave is arching.


Hi.
If your microwave cavity is crossed by luminous discharges of current , and you see flashing arches of current from the magnetron area to other areas of the microwave oven cavity, then we commonly say that the microwave is arching.

The first thing to do in this case is disconnecting power immediately, and trying to remove the cause of arching if possible.


Arching will damage the microwave oven, if it goes on for enough time.
Any metal conductive object, such as a spoon or a fork will cause arching if left inside the oven when the microwave device (the magnetron) is operating.
Ensure that there is no metal object inside, while the appliance is operating.
Some vegetable with an high amount of metal , and some other ingredient, like bacon , are known to cause arching in sporadic cases.
In that case add a little water to the food in the oven and try again.

Sometimes recycled paper, or use of containers that are not for microwave can also cause arching. In that case use a different container, or paper.
If there is arching and bad burnt-plastic-like smell with any food being cooked, that means that there is a major problem, and that if the oven is used in this condition, you may get further damage to the appliance. In some case there may also be safety concerns.

As said, you get arching inside microwave when inside the cavity there is a strongly conductive object, such as a metal object or carbon residue.
You also get arching when the oven cavity is damaged.
In this last case the cavity may have lost insulation, and it is better having the oven repaired by a technician, that will also conduct a radiation leak test on the appliance to prove its safety.


To attempt fixing the problem by yourself , you can do the following:

Disconnect power cord.

Check inside the oven cavity, ensure that there is no foreign object inside (such as a small screw). Check also under the turntable.

Check that the light and the magnetron covers are well in place.

Clean the cavity thoroughly, clean also the lamp enclosure if this can be accessed. Carbon residue from food may be causing the arching.


If after cleaning the arching is still there, that means that the cavity is damaged. In that case better calling a technician.
A damaged microwave may loose insulation , and this may be very dangerous for health.

If you want to contact a technician, the best thing to do is ringing the phone number listed on the appliance owners manual.




Ginko.

on Feb 06, 2010 | Microwave Ovens

1 Answer

Its arching and humming


Once a microwave starts arching it is a real problem. They are coated with a special paint and if the paint gets scratched then arching gets worse and it can burn out the whole oven. See this page: http://www.microtechfactoryservice.com/

Feb 26, 2013 | Emerson Microwave Ovens

1 Answer

Electrical arching between top metal plate and shell?


i would imagine its a shield but iam not completely sure without a good look

Nov 20, 2011 | GE XL1800 1100 Watts Microwave Oven

1 Answer

I have a Frigidaire over the stove microwave that pops/arcs


Hi,
Here is a tip that will help you to figure out what is wrong with your Microwave Oven....

Microwave Oven Basic Troubleshooting Tips
http://www.fixya.com/support/r5508031-microwave_oven_basic_troubleshooting

heatman101

Dec 15, 2009 | Frigidaire GLMV169D Microwave Oven

1 Answer

My microwave is making a loud buzzing noise and there was some charred areas inside on side wall


The loud noise is probably the magnetron makign the noise. The charred areas on the wall are from possible grease or food particles arching and burning the cavity. Alot of times there is a cover on the wall it burns. it would need to be replaced, as well as sand and paint the cavity area that is damaged with m/w grade paint.

Nov 21, 2009 | Thermador MBBS Microwave Oven

1 Answer

Arcing


My Advantium was arching at the turntable. Replaced the turntable roller assembely (that hold the metal or glass plate) and the arching went away.

Nov 16, 2008 | GE Advantium 120 Convection/Microwave Oven

1 Answer

Arching inside microwave


un plug it right away.

there are carbon deposit near the wave cover. the arching is coming from the magnetron to any exposed metal inside the unit or any carbon deposit since carbon is already conductive, it is sensing it as a metal.

remove and clean the interior of the microwave. polished and paint all exposed metal that you will find in the interior.

then test again the unit.

tnx 4 using fixya,

drcool

Sep 30, 2008 | Whirlpool GH7145XF Microwave Oven

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