I am at a loss as to what is wrong. A week ago the motor went out on our pump (Pac-Fab Challenger 2HP, 1.3SF). I ordered a new one and installed it today along with a new main seal. Put water into the basket, turned it on, and it won't prime.

I did get it to prime once by opening the pressure relief valve on the filter. But, when I switched from service to auto, it won't reprime. And now I can't get it to prime at all. I've disassembled it and re-assembled it 2 or 3 times and everything looks fine.

It's a 230v pump.

Any ideas?

Thanks,
Kevin