Zodiac
Thermal Cycling / Overload Trip
Pump starts and then shuts off after a short time, repeatedly cycling on and off.
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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
Overheating motor, Blocked ventilation, High mechanical load from clogged impeller, Incorrect voltage
How to Fix / Troubleshooting
Safety: Disconnect power and allow the motor to cool before touching.
- Clean vents: Remove debris from motor cooling vents and ensure the fan can spin freely.
- Inspect impeller: Open the pump wet end and check for debris wrapped around the impeller or shaft.
- Check filter and valves: Clean the filter and ensure valves are open to reduce system backpressure.
- Measure current draw: A technician can compare motor current to nameplate rating to determine if the motor is overloaded or failing.
Persistent cycling usually indicates a failing motor that should be replaced.
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Repair Difficulty
Hard
4/5
Required Part
Pump Motor Assembly
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