Forum Discussion
DrewE
Dec 03, 2016Explorer II
Arcs can be due to a buildup of crud on or in or around the waveguide. There generally is a thin plastic sheet thingy over it. Take the sheet piece off, clean, and put back. If it's too far gone, you probably could get a replacement piece from an appliance repair place for not too much money.
There are of course other possible causes, but this is a relatively common one.
There are of course other possible causes, but this is a relatively common one.
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