In article , HerHusband wrote:
Well, it was worth a try, but the DPST switch did not fix the problem
either. It worked fine for about two weeks, then tripped again a
couple of days ago.

Please describe how you wired the DPST switch; post a diagram if
possible.

As you would expect. The incoming hot wire goes to one pole of the switch,
the incoming neutral wire goes to the other pole. Then the switched hot and
neutral go directly to the fan.

The ground wire is directly tied to all other grounds.

If it's *still* causing the GFCI to trip, then I see only two possibilities:
1) the original GFCI *and* the replacement are defective
2) there is a ground fault in the fan itself.

--
Regards,
Doug Miller (alphageek at milmac dot com)

It's time to throw all their damned tea in the harbor again.