Three times in the past two days I’ve discovered my refrigerator and microwave oven not running due to a tripped circuit breaker. Twice this has happened during the night when the only thing running would be the refrigerator. Both appliances plug into the same outlet, and as far as I know, nothing else is on that circuit (if it happens again, I’ll look to see if anything else is off).
What might be causing this? What can I do to trouble shoot the problem before calling an electrician (which I really can’t afford right now)? This is an old house with ancient wiring; the refrigerator is five years old.