Just replaced an old leaking PAR pump with a new Jabsco
flojet 4405-143a, which we had onboard for this occasion. Still boxed, but not a new purchase
. Everything worked fine for two days. Now the pump runs fine with plenty of pressure but will not shut off. The system is holding pressure long after the panel control switch is turned off so I am sure that no leak after the pump is present. Both tanks
are full, and no air is present.
I am thinking that it is probably the pressure switch on the pump. Seems strange on a brand new pump. Can anyone think of another possibility?