Pump does not prime (motor operates, but no pump discharge). Restricted intake or discharge line Air leak in intake line Debris in pump Punctured pump diaphragm (leak) Crack in pump housing Amp supply is insufficient to fully start the motor
Motor fails to turn ON. Loose wiring connection Pump circuit has no power Blown fuse Pressure switch failure Defective motor
Pulsating flow. Restricted pump delivery: check discharge lines, fittings and valves for clogging or undersizing.
Pump fails to shut OFF after all fixtures are closed. Empty water tank Insufficient voltage to pump (low battery) Punctured pump diaphragm (leak) Discharge line leak Defective pressure switch
Low flow and pressure. Air leak at pump intake Accumulation of debris inside pump and plumbing Worn pump bearing (excessive noise) Punctured pump diaphragm (leak) Defective motor
