Question about Panasonic NN-P794SF Microwave Oven
You don't say how long this has been going on; I'm going to presume it's a recent development.
Several possible scenarios come to mind. I'd first look around and see if any other appliances have been connected to that circuit. In my area (Minnesota), the electrical code requires that microwaves have their own dedicated circuit and breaker; if this is not the case, you need to see what else is competing with your microwave for that breaker's power supply.
One other possible cheap fix - in case the breaker is defective, try swapping out the breaker in-question for another of the same rating (DO NOT, repeat, DO NOT put in a bigger/higher-rated breaker without having a qualified electrician OK it). If this isn't the problem, it never hurts to have a spare circuit breaker on-hand. Might even be able to switch around with another of the same rating, just understand that you'll lose power to both circuits for the duration of the test.
If it's on it's own dedicated circuit, then it's likely the oven itself with an internal short of some kind. Because I don't know your level of skill in dealing with 110V AC electricity, my recommendation is that you have someone qualified open it up and start checking short-circuits with a multi-meter, observing all safety precautions.
If you've isolated the problem to being the oven, and it's going to cost more to troubleshoot than replace, you might be able to cut a deal by trading-in your old oven against the new one - - if the shop you buy from has quailfied repair people on-staff, they might be able to refurb and re-sell it used.
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Posted on Feb 21, 2009
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Posted on Jan 02, 2017
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