Why Strong Spa Will Not Run And How To Troubleshoot

1. • Dirty Filters: Clogged filters restrict flow, causing overheating.
   • Air Lock: Air trapped in pipes after draining/refilling.
   • Closed Valves/Jets: Blocked pathways.
   • Low Water Level: Skimmer sucking air.
   • Fix: Power off, clean filters, ensure water is full, bleed air from the system (by running jets, cracking unions, or using a hose in the filter standpipe), and check for closed valves.
2. Faulty Temperature/High Limit Sensor:
   • Sensor Malfunction: A sensor provides incorrect readings (e.g., false overheat), triggering a shutdown.
   • Stuck Heater Relay: Causes extreme overheating.
   • Fix: Inspect sensors (usually near the heater) for corrosion; test resistance; reset the high-limit switch (red button on spa pack); power cycle the spa.
3. Control Board/Wiring Issues:
   • Loose Connections: Vibration or moisture can loosen sensor wires.
   • Damaged Wires: Rodents or heat can damage wires.
   • Faulty PCB: The main circuit board can fail.
   • Fix: Visually inspect wiring for damage; if errors persist after flow checks, a technician may need to test the control board (PCB)

Troubleshooting Steps

1. Power Cycle: Turn off the breaker for 5-10 minutes.
2. Check Water & Filters: Ensure water level is adequate and filters are clean.
3. Bleed Air: Run jets with the filter removed or open standpipe to clear air.
4. Inspect Sensors & Wiring: Look for obvious damage or corrosion on the sensors by the heater.
5. Reset: Press the red reset button on the spa pack if available.
6. Call the experts at SpaStore.com 858-210-8062 to troubleshoot faulty sensors, relays, or the control board.