Zodiac
Failed Start Circuit / Seized Motor
Pump hums but does not start; may trip breaker after a few seconds.
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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.
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Possible Causes
Seized motor bearings, Debris jammed in impeller, Failed start capacitor (on single-speed models), Low supply voltage
How to Fix / Troubleshooting
Safety: Turn off power and verify the pump cannot start unexpectedly before working on it.
- Check for impeller jam: Remove the pump lid and basket, and feel for debris in the impeller. Clear any obstructions.
- Spin motor shaft: At the rear of the motor, remove the cover and try to rotate the shaft or fan by hand. If it is stiff or locked, the motor bearings are likely seized.
- Inspect capacitor (if accessible): On some Zodiac single-speed pumps, the start capacitor is under a hump cover. Look for bulging or leaking. Replace with an identical-rated capacitor if faulty.
- Verify voltage: Have a qualified person check that supply voltage is within spec.
If the motor remains unable to start, replacement of the motor assembly is usually required.
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Repair Difficulty
Hard
4/5
Required Part
Pump Motor Assembly
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