Onga Marginal Overload / Cooling Deficiency

Pump is excessively hot but still running; thermal overload has not yet tripped.

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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

High ambient temperature, restricted airflow, running at higher head than design, incorrect impeller size

How to Fix / Troubleshooting

Safety: Use caution when touching the motor; surfaces may be very hot.

  • Improve ventilation: Remove obstructions around the Onga motor and consider adding shade without blocking airflow.
  • Check system head: Ensure the filter is clean and valves are fully open to reduce load.
  • Verify impeller: Confirm the impeller matches the motor rating; an oversized impeller can overload the motor.

Monitor temperature after changes. If the motor remains excessively hot, consult a technician to measure current draw and confirm suitability.

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Repair Difficulty

Medium 3/5

Required Part

Onga impeller
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