I just had a customer who is having a similar problem. He has a GFI in his garage that is tripping randomly, say 1 or 2 weeks. It'll just trip with no apparent reason. I checked it out 2 different times. One time I found an outside outlet with loose wires. Thought that was the problem, since he had a fountain pump plugged into it, and thought maybe the arching was causing it. Turned out it still tripped actually the same day that time several hours after I left. I went back, and found a drop cord that was going under his house had some bad places in it. We replaced the drop cord. I then went up in his attic to check some "home wiring" he had done, placed a few wirenuts on joints he had made without putting any on them. Left that time, told him to disconnect the fountain pump if it did it again, and see if that made any difference. Left and he called me back today saying it tripped in about a week after that with no load on the circuit. Since it is getting costly for me to go back each time, I told him to change the GFI outlet, (which he told me was a new one to start with). I suspect the wiring he done may have something to do with it, but without tearing everything apart, I don't know. Hoping it's just the GFI outlet. The reason I didn't change it to start with, is he told me it was new. But his idea of new, I think is a year or two.???
Very odd though that it trips randomly with no load connected to it. Anyway I would try the GFI first on your problem... I also had one, one time that would do a lot of clicking, brand new from HD store. I had to replace it. Hated to though. I had to travel probably round trip of 30 to 40 miles to do it:( Hope it helps.. Steve
