Question about Whirlpool GH9176XM Microwave Oven

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Arcing Sound and Burn Marks

Within a few weeks of initial install (2003), we noticed a strange, arcing sound coming from the microwave. We then noticed burn marks in the cooking instruction decal inside the door. The installers came out and tried to say it was okay, but they ended up replacing it. We didn't have trouble with it until just a few weeks ago (Sept 2008). Same problem is back. In addition, the microwave stops for a few seconds (lights& power off while timer counts down) within a few seconds of being started, then power returns. It also seems that it does not cook as fast as it once did. Any advice??? We paid quite a bit for this and it has never lived up to expectations. None of the "sensing" features work (all overcook- drastically) and the timer starts over on occassion.

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SOURCE: whirpool GH9185XL problem

GH918 4xLQ-1 Microwave
Runs for a few seconds, stops, and displays F7.
I've lost my manuel. Thank you!

Robin Newell
1702 Dover Circle
Salina, Ks. 67401
(785)827-6185
newell_robin@yahoo.com

Posted on Jun 12, 2008

MicrowaveSvc
  • 8865 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

MicrowaveSvc
  • 8865 Answers

SOURCE: GE Microwave is arcing inside

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 the plastic ceiling.

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.

If you need more specific help, please reply back with your brand and full model number.

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

Posted on Feb 03, 2009

  • 338 Answers

SOURCE: Arcing in microwave oven (Welbilt MR95TW microwave oven)

the magnetron is what is arcing.. not sure if i would consider it easy enough for a do it yourselfer. there are a few components that need removing. plus the mw needs to be taken down in order to do it.

Posted on Mar 04, 2009

MicrowaveSvc
  • 8865 Answers

SOURCE: We changed the oven bulb and now the microwave

There should 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.

dee77f7.jpg

At
our Web site, we have a video available showing how to remove a typical over the range control panel assembly in under 5 minutes.

It may just be a fuse. Some models have more than one.

Otherwise, I would suggest that you check all the door switches and mounts.

See:
http://www.microwavedisplay.com/safety.txt
http://www.microwavedisplay.com/disassembly.txt
http://www.microwavedisplay.com/doorsw.txt

Otherwise, feel free to contact me directly (and please remind me of your full model number from the tag on the unit) for more information & DIY help and/or an estimate.

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

William E. Miller, AS-EET
prototech@usa.net
http://www.microwavedisplay.com
Microwave Oven Control Panel Repair Nationwide

Posted on Dec 05, 2009

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1 Answer

Why is there a burn hole inside the oven, on the cardboard?


That's actually a mica "window" (cover) for the microwaves to come out. And it sounds like the magnetron started arcing and burned a hole in that cover. Either that, or some food (frequently spaghetti sause) got splattered on it, and the microwaves heated it up so much that it burned a hole in the cover. Does the microwave oven still work (heat)? Do you see or hear any arcing? If the microwave oven still works and there is no arcing, you can just replace that cover. Check SearsPartsDirect.com or RepairClinic.com.

Jul 10, 2014 | Kenmore Microwave Ovens

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Emerson microwave oven model mw9339sb has an arcing magnetron


The magnetron is supposed to make an arc to work but when it is getting out of hand it will sound wrong. At that point it is time to change the large capacitor and the magnetron. If there is an arcing inside the cabinet then you have to look for missing powder paint. Don't use any metal racks in a microwave or they will arc.

Dec 01, 2013 | Emerson Mw9339sb Microwave Ovens

1 Answer

I have a Sharp Carousel Microwave R-1460A. The disk on the ceiling, opposite the warming plate and about the same size, has severe burn marks (probably from food splatters). Any idea what that part is


see this indication and fix it. God bless you
  1. Waveguide coverSparking and arcing in a microwave can be caused by a damaged waveguide cover. Try removing the waveguide cover to see if the problem persists. Once removed, the waveguide cover can be inspected for burns, which will indicate if this is the issue. If the waveguide cover is burnt or will not stay in the proper spot it will need to be replaced.
  2. Cavity/Rack supportIf sparking or arcing in your microwave is near a rack support, any exposed metallic area can be covered with a microwave cavity support. It is also recommended to replace the rack supports in this situation to ensure the issue is resolved.
  3. Cavity paintIf sparking or arcing in the microwave is visible on the side walls, the paint covering the metallic areas could have worn off or chipped. This can possibly cause pitting in the side walls or ceiling. If this is the case, it can be repaired with microwave cavity pain

Nov 08, 2013 | Sharp R-1460 Microwave Oven

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MAYTAG MICROWAVE OVEN ARCING FOOD ON PLATE, HEATS EXTREMLY FAST. PUT BABY FOOD (SWEET POTATOES ON A PLATE AND WITHIN 5 SECS THE FOODS BEGINGS TO ARC AND BURN


The magnetron is getting to hot and will eventually fail, especially when it is arcing, "a safety issue convern" the cause is the part mentioned above, or there is exposed metal on the inside cavity.

May 07, 2012 | Maytag 1.6 Cu. Ft. Over-the-Range...

1 Answer

I have a GE Profile Advandium 120 SCA1000DWW03 microwave. Recently noticed arcing or sparking at the base of the back wall when microwaving. Any ideas or solutions? Was purchased about 5-6 years ago


This is not good, the magnetron is arcing because there is exposed metal. The manufacture provides a special enamel white paint that insulates the interior to prevent this. I would contact GE or appliance repairman and not use the oven until this is dealt with, running the microwave unchecked will eventually burn out the magnetron.

Feb 06, 2011 | GE Microwave Ovens

1 Answer

Our Kenmore microwave started emitting odors and then quit


To figure out what is wrong with it, it will have to be removed from the wall, Then the top cover will have to be removed, then you can look for any swelled capacitors, burn marks on the circuit board or any shorted wires.
The power supply is most likely faulty . You can test the power with a voltmeter from power supply to main circuit board.

Oct 28, 2009 | Microwave Ovens

1 Answer

Arcing Microwave Oven


Look in cavity for any burn marks. If burn marks are present sand and paint area. You have to use paint made for microwaves. If no burn marks, Flash coming from magnetron and it would be time to replace. Yes it can be a safety concern, I would not use until fixed.

Mar 11, 2009 | Kenmore Microwave Ovens

2 Answers

GE Microwave is arcing inside


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 the plastic ceiling.

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.

If you need more specific help, please reply back with your brand and full model number.

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

Nov 13, 2008 | GE JES1384SF Microwave Oven

1 Answer

XL1800 Microwave Problem


A LOUD ticking sound could very well be a High Voltage Arc. This is usually caused by a breakdown of insulation on High Voltage Wires, or components. It can also be arcing between the door frame and the cavity. Usually where the bottom of the cavity floor meets the door frame. Indication of this will be small areas on the door where it looks like the paint has been chipped off, but if you look close you will see it is small burned marks. Another area is the Splatter Shield located inside and at the top. It looks like a Plastic Cover. It is not plastic, but a fiber material. Grease, and food will get trapped on and under this Splatter Shield. Over a period of time the grease and food particles will break down from being cooked over and over again. They will then form Carbon. Which will Arc when Microwaves are present. Remove Push-Pins holding Splatter Shield. Clean by washing with dish detergent . If burned (arc) spots are still present after washing, replace Splatter Shield or arcing will continue. Once Carbon has burned through, it will continue to burn.

Jan 21, 2008 | GE Spacemaker JVM1640SJ Microwave Oven

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