Question about Microwave Ovens
Assuming nothing's loose (such as from past repair attempt) then it may be the magnetron failing.
Your best bet is to keep using but (as always) do not leave it unattended while it's running.
Then if things get worse in some way, that would be a harder failure that can be assessed more easily.
If you are close to the end of the warranty period (1 year parts & labor or 9-year magnetron, e.g.) I would not wait past then.
GE Customer Service is here if you would prefer service now and want to find your nearest GE-authorized servicer.
We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.
Posted on Oct 20, 2008
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