[Carl n Susan]

Thanks all, but not the answer.

Originally Posted by artfuldodger

Air in one of the water lines will do that. Open each tap, the shower, flush the toilet, open the low point taps, the laundry taps until the pump shuts off.

All faucets have been opened on shore water. No air bubbles.

Originally Posted by DutchmenSport

This happens to me many times after filling my fresh water tank. Every time it happens it's because I flipped the winterizing valve and didn't realize it.

Check your winterizing valve. I bet it's "on".

Winterizing valve is in it's normal position. If it were "ON" the shore water would have a problem too. It doesn't