"jg" wrote in message
...
This project just keeps getting more interesting....

So tonight I troubleshooted some more. Here are my steps and
findings.

New tests:
1. I disconnected the hot wire from one of the 7 or so devices. I
supplied power.
GFCI did not trip. Excellent news.
2. Just for grins I connected the 120 device from step 1.
GFCI did not trip. This is weird!
3. So I connected all the external connections (blower, motor, etc.,)
set the heat to the lowest setting and supplied power.
GFCI did not trip. Even more weird!
4. I figured something must have been damp... so I left everything
running and started putting the panel back on.
Half way through my first screw, GFCI trips again. Bummer.
5. So I open up the panel and disconnect the motor. I then supply
power.
GFCI does not trip.
6. If I connect the motor back on and once again supply power
GFCI trips.
7. I repeated 5 and 6.
Same results as the first time around for 5 and 6.
8. So I rotate the clock so as to have the motor not run (it it set
to only run at certain times of the day) and repeat steps 5 and 6.
Now the GFCI does not trip.
9. With motor connected and power supplied, as soon as I rotate timer
to supply power to motor...
GFCI trips.

Conclusion:
So now evidence points to a faulty motor.... but the interesting
things is, that up until now, all my other tests (and GFCI trippings)
have been with the motor disconnected. Of this I am 100% sure.

So do I have a faulty GFCI? It is starting to look that way. I am
thinking of bypassing it next. However before I do that, I will
replace the external GFCI just in case.....

Anybody have any other suggestions/ideas?

jg





Once again supplied power and as long as the motor is not running (I
have it on a timer) it is all good. However, as soon as I rotate the
clock (to supply power to the motor) GFCI trips again. So now
evidence points to the motor


It does, although previously the GFCI tripped without the motor attached.
It's a shame that so much wiring is crammed into such a small box. It really
makes it difficult to see if anything is grounding.
I would try to follow the neutral wire that feeds the pump, to be sure that
it's not coming in contact with ground, but IMO, most likely you have an
intermittent problem with the pump