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My micro is producing fire during cooking cycle even though i only used micro safe ones. Some sparks are coming from the metal strip like thing on the inside wall.

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Check to see if any paint is chiped off in the cabnit if it is you can buy touch up paint for the inside of it that works sometimes if not the microwave needs replaced

Posted on Jul 15, 2009

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Sparks when cooking

Make sure no metal item (forks-spoons or oven rack) is touching the outer wall of the microwave. That will cause sparks. If all that is OK then there is usually a metal fan type blade in the microwave top called a stirrer blade that may be out of place and rubbing the cavity causing sparks. Try to pin point the spark area so you know where to look for the problem. Sparks usually mean metal is touching metal somewhere.

Mar 29, 2015 | Whirlpool MH7135XE Microwave Oven

1 Answer


inside your micro... walls are made of metal but protected with paint, if this paint is gone and the metal shows thats what happend you have to repaint the unprotected areas again, and the reason your micro... is not working so good anymore is due to the magnetron

Jan 31, 2014 | Sharp R-930AK Convection/Microwave Oven

1 Answer

I have a Kitchenaid YKHMS147HW microwave that started turning on by itself, and will not shut off unless I unplug the unit. If I put food in to cook, the food starts cooking as soon as I plug the unit in,...

Sounds like stuck relay contacts. Magnetrons need a high voltage source which is controlled by a micro to relay and then from relay to voltage source. Even the turntable works via a relay.

Oct 14, 2013 | Microwave Ovens

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Microwave is arcing and making a popping noise as if something metal was in there while cooking.

I will assume that you do not have any metal items or bits of tinfoil lying around inside the oven.

If the sparks are happening on the inside of the microwave's cooking area while you are cooking, then make sure you clean the inner surfaces really well. Be sure to remove any cooked on food particles that may have splashed up during cooking.

Most likely you have some corrosion or dried food debris inside the cooking area, or perhaps even some food particles stuck to your WAVEGUIDE COVER PLATE. A dirty waveguide cover plate can certainly cause the arcing and sparking you describe.

If the thorough cleaning does not work, you may need to replace the waveguide cover. Here is a link to a short video that shows you exactly how to replace the wave guide cover yourself:

Just use your mouse to click on the link, which is the underlined and highlighted text just above. This will open a new web browser page automatically for you and allow you to view the video at the website indicated.

If the sparks are coming from somewhere other that the cooking area, then your unit may need more significant electrical repairs or service.

Here is a link to another expert's excellent Microwave Troubleshooting Guide:

If you choose to rate Heatman 101's tip using the Thumbs Up scale provided, I thank you very much for your time and consideration.
I hope that was helpful to you, good luck and take care.


Jun 21, 2011 | Samsung SMH9187ST Microwave Oven

3 Answers

When I use my microwave, it seems it was spark happening when I use it. I'm afraid to test it again. Please tell me how I should know it's safe to use

2 things cause sparks.... a damaged Waveguide RF window or bare metal inside the cooking area. If you note bare metal you can sand and paint it with an appliance enamel paint. (no lead paint!) Just make sure to only sand the area your painting as any sanding scuffs not painted will hasten a repeat performance of the sparking routine. The RF will bounce off bare metal and cause the sparking. Once PROPERLY painted it no longer sparks.

If it is coming from the area of the Waveguide RF window... Make sure the window is replaced before next use.

Thanks for choosing FixYa,

Apr 21, 2011 | Frigidaire Model PLMVZ169GC Microwave Oven

3 Answers

99 Chevy Lumina won`t start

do mean that the plugs are firing even though the engine is not cranking?

Apr 24, 2010 | 1999 Chevrolet Lumina

1 Answer

Heat strips do not energize during defrost cycles air below 50 degrees up to 14 minutes

if your heat strips are not coming on, then there are a few things to check.

The first one would be that the heat strips are actually working. The easiest way to complete this task is to turn the system on into emergency heat and turn the thermostat up. If you get heat accompanied by the traditional strip heat burnt smell, then you know the electric heat strips are working.

The second thing would be that the air handler is receiving a command for heat during defrost cycle. If the command is present with no heat, then you most likely have either a wiring issue or a failed electrical relay or contactor.

The third thing would be the defrost board itself, for it is the component that calls for electric heat strips to come on during a defrost cycle. You may or may not be able to force the defrost board into a defrost cycle and then check that the heat strips are on or not.

It sounds as though your defrost board is bad with the symptoms you are describing.

Good luck.

Jan 14, 2010 | Ruud Heating & Cooling

2 Answers

Sparks and strange noise when microwave is turned on even when empty inside. i have a ge jvm1850smss over the oven microwave.

YOU SHOULD NOT RUN MICRO WITHOUT ANY THING IN IT / THIS WILL OVER LOAD THE MAG TUBE . AND SOME TIMES FRY IT .. The sparking and arcing is probably a bad wave guide . this is sometimes caused by food splater / it gets in the cracks and corners and then cooks till it truns to carbon which conduts the micro's and thus arching .. clean it good and touch up any burns in the metal and repl wave guide cover. mm hope this will help .. mm

Dec 20, 2009 | GE Spacemaker Over-the-Range Microwave

1 Answer

Moisture sensing strip coming off

it can work on timed dry with out the strips. they are only in use during auto dry cycle

Nov 20, 2007 | Maytag Neptune MDE5500AY Electric Dryer

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