U.S. Motors pool pump runs intermittently; it starts and stops randomly without user input.

Safety first: Turn off power before tightening any electrical connections.

• Check line connections: Inspect and tighten all line terminals at the pump, timer, and breaker. Look for signs of arcing or heat damage.
• Bypass timer: Temporarily bypass the external timer or automation relay to see if the pump runs steadily on direct power.
• Monitor motor temperature: If the motor is very hot when it stops and restarts after cooling, the internal thermal overload may be tripping due to overheating. Investigate causes of overheating (load, ventilation, voltage).
• Inspect control board: On variable-speed models, look for cracked solder joints or loose connectors on the U.S. Motors control board.
• Replace faulty component: Replace the external timer/relay if it is dropping power, or replace the motor/control if internal faults are confirmed.