U.S. Motors pool pump will not start at all; no hum, no sound, and the motor shaft does not move.

Safety first: Use a non-contact tester and multimeter; always turn off power before opening enclosures.

• Check breaker and GFCI: Inspect the pool sub-panel for tripped breakers or GFCI outlets. Reset if tripped, but investigate cause if it trips again.
• Verify voltage at pump: With the timer set to ON and power applied, measure voltage at the U.S. Motors pump input terminals. No voltage indicates an upstream issue (timer, contactor, wiring).
• Inspect wiring: Turn off power and check all connections at the pump terminal block for tightness and signs of overheating.
• Check motor overload: Some motors have a manual reset button on the motor body. Press to reset if tripped.
• Bypass timer for test: Temporarily bypass any external timer or automation (per safe wiring practices) to see if the pump runs on direct power.