Jet pump hums but does not start; may trip breaker after a few seconds
Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
Possible Causes
How to Fix / Troubleshooting
Safety first: Turn off power at the GFCI breaker. Do not repeatedly try to start a humming pump; this can overheat the motor and wiring.
Steps to address a humming pump:
- Check for obstructions: With power OFF, remove the pump wet-end cover (if accessible) and inspect the impeller for debris. Ensure the impeller spins freely by hand.
- Inspect capacitor (advanced): Many Strong Spas pumps use an external start capacitor. A bulging or leaking capacitor should be replaced with an identical rating.
- Verify voltage: Have a qualified person confirm correct voltage at the pump terminals when starting.
When to call a technician: If the motor shaft is stiff or seized, or if a new capacitor does not resolve the issue, the entire pump assembly should be replaced by a professional.