Old-Biscuit wrote:
Wires in the pump end go to the pressure switch then to motor.
Pressure switch closes (loss of pressure) and motor runs.
Pressure switch opens (pressure set point reached) and motor stops.
Pumps are self priming and can run dry w/o damage.
Air leaks on suction side of pump will cause lack of water being pumped....can't suck water when it's sucking air
Anyway..thought you stated pump wouldn't turn on......motor wouldn't move....lights dimmed etc. from frozen pump :H
When I got the pump all the way out I found what you are saying. I took the pump all the way apart and hooked it up to a 12v source and still only a slight bump and a froze motor. It has 1999 stamped on the side as a build date so it is time for a new one. A local RV dealer has one (or the new model number from this decade from ShurFlo) for $103. Hopefully they didn't change mounting points too much.