What I've seen from my trouble shooting. The pressure switch seems to be working correctly and there is power to the switch. While watching the pressure gauge, I see a spike approx. once per minute as the ?pump? tries to kick on. Eventually it catches (not sure if that's the right term), I can hear the water flowing and the pressure rises to the normal cut off and the pump cuts out. I can then run the water, decreasing the pressure in the tank and watch the pressure swithc cut over at the cut in pressure... though the pump doesn't necessarily cut in.
Some other data points... from a zero pressure, I've seen the pump catch, and then cut off about a second after, but most of the time, it just kicks up the pressure (to approx. 40 psi) and then stops... this probably takes 1/2 second.
Any help would be greatly appreciated.