Ok, please help me. Please. Here is the scenario: Water pressure goes to nothing on Sunday night. I don't know what's happened and I'm not familiar with this stuff, so I wait until Monday to talk to those who ARE familiar. I get home and start checking things out. Pressure switch is wired correctly and sending 240V to the pump. Check the wires that are heading down to the submerged pump; also have 240V. Clearly power is heading to the pump properly. Sounds like the pump is the culprit. I go inside, and flip the breaker ABOVE the well pump 15A breaker. Instantly, the pump starts running. Fills the tank, and acts completely normal until Tuesday night. Tuesday night, same thing. Loss of pressure, pump not running. I check breakers and all looks good. Still have 240V at the pump leads. But GET this. I turn the pump off at the circuit breaker to make new wire connections at the top of the well, just to make sure corrosion isn't the culprit. When I flip the breaker back on for the well pump, of course I see 240V at the pump leads, but oddly enough, the heat pump circuit breaker trips. Anyone that can make sense of that, please, feel free.