When the pump will not turn on
Possible causes include a tripped breaker, failed pressure switch, damaged control box, wiring fault, failed pump motor, or low-water protection device.
When the pump will not shut off
Continuous operation can be related to a leak, low well yield, clogged components, an incorrect pressure setting, a damaged pressure tank, or a worn pump.
Short cycling
Rapid on-and-off cycling often points to pressure-tank, switch, or plumbing issues and should be addressed before repeated cycling damages equipment.