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Why is my microwave door arcing?


Posted by curt mason on


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William Miller

  • 9179 Answers

SOURCE: The microwave model is Kenmore 721.62464201. It's arcing.

This is usually caused by grease or food debris.

First these areas
should be cleaned with a mild, non-ammonia cleaner on a soft cloth. You can use a grille brush if it's stubborn.

Any metal chipped or charred metal will have to be sanded smooth and clean.

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

You can find handy exploded views and order any needed parts at the Sears Parts Site.

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

Posted on Nov 29, 2009


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Microwave Panasonic H98

Please check your door safety interlock switches.

When you open the door with the oven running, to check stuff, there is an arc on the tiny contacts. Eventually, they burn and are not able to tell the oven that the door is shut. Forget what you know about the door, the oven has to be sure the door is shut and it uses these little switches for that purpose.

There are other reasons for no heat, this is the most likely one. Check them with a volt/ohm meter. If failed, get replacement from Panasonic, your appliance parts distributor in your town, advertiser, Radio Shack or

Good luck with your repair.

Thanks for your interest in

Panasonic Microwave NNSD277B 5yrs old makes noise after 20sec on (bUzzing and popping)and internal light flashes. Should be replaced or fixed ? what could be the problem?

You should have no arcing within the unit. Assuming you have adequate food/water in the cavity, it should not arc. You NEVER run the unit without something to be heated in it!!!

You might check the stirrer fan which is often in the roof of the unit to see if contamination might be in the area causing arcing. The electric fields in th area are very high and arcs can jump.

If the insulating window is charred or has charred grease, it should bbe replaced.

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its the problem of voltage the a electrician and get the electricity power checked of your place.the oven is getting required current so this problem is coming.

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small_6_37.jpg For a detailed Microwave illustration, click below.

redarrow.gif Counter top
redarrow.gif Built in
Danger! You can receive a serious electrical shock from the components inside your microwave oven--even when it's unplugged. Only a qualified appliance repair technician should perform any repair.

It doesn't work at all
It sounds normal, but there's no heat
I can't adjust the power level
The carousel won't turn
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It quit after I slammed the door
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hope this may help;



Modelnn-h264/s254 1100 watts

This door screen as it's called protects the metal mesh screen from moisture and food debris. The door screen must be replaced or the mesh screen can arc and be damaged, which can lead to microwave leakage. You can order a new screen from Panasonic at: It may be this part: F31455H00AP DOOR SCREEN A 5.75 But it might be better to call Panasonic at 800-833-9626 and be sure this is the right part. Be sure to have your FULL model nuber (with suffix) when you call. Be sure to use a cleaner like acetone, etc. to remove all the old adhesive before applying the ne wone, or it will not stick. The door must be squeaky clean and dry.
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