try expressing the problem again, the op is vague.
1. is the pump SPONTANEOUSly running without opening a faucet?
2. is the pump running only PART of the time when a faucet is open?
these are 2 very different issues.
#1=leak somewhere typically...
#2=early pump failure for any of several different reasons.
or maybe the problem is something else?
a "switch failure" should be easy to verify using a multimeterlectrical gizmo on the wires.
all of the true things that i am about to tell you are shameless lies. l.b.j.
we are here on earth to fart around. don't let anybody tell you any different. k.v.