On Sat, 23 Aug 2008 15:07:33 -0700 (PDT), unklerichie
wrote:

Thanks for everybody's input.

I replaced the GFI today and still have the same problem. I'll try
cleaning the motor (with compressed air!) and see if that works. TS
Fay has dropped a foot of rain around here the last four days, and
though the wires and motor are protected, maybe there's dampness I
can't see.

I'm about the furthest thing from an expert, but for clarification,
the fan is on the same circuit as the GFI's, but not plugged into the
GFI, right? Are there other loads running on the GFIs when they trip?

40" fan is pretty big, it could just have a big, fat turn-on surge,
but how long as this been going on? And is the fan plug two or three
prong (presume three). And have you checked the ground to the fan
outlet?

J.