Pump starts and stops repeatedly within short intervals without user input.

Safety first: Turn off power at the breaker before inspecting wiring.

• Inspect power connections: Tighten all line and neutral connections at the pump terminal block and sub‑panel.
• Check for overheating: Feel the motor housing after a short run (carefully). If extremely hot, the thermal protector may be cycling due to overload or poor ventilation.
• Bypass external controls: Temporarily disconnect external automation or pressure switches and run the pump directly from its own controller to see if cycling stops.
• Monitor with clamp meter: Measure current draw during operation. Large fluctuations may indicate internal motor or drive issues requiring replacement.