On Thursday, May 28, 2015 at 10:16:04 PM UTC-4, wrote:
On Thu, 28 May 2015 20:40:06 -0500, wrote:

On Thu, 28 May 2015 20:52:07 -0400, wrote:

Don't be terribly surpriaed if the new one trips too. My bet is on
moisture in the cable somewhere causing a very small ground current to
flow - tripping the GFCI as it should.

He said he disconnected the wires.....
If he removed the load wires right at the GFCI breaker, it pretty
well eliminates wiring issues. If he just disconnected the pump, there
are still wires involved. Not always accurately described.

More often not accurately read by some folks....