Intex Noisy Circulation Pump

Spa makes loud humming or grinding noise from heater pump unit during filtration

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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

Debris in pump impeller, Air in pump causing cavitation, Worn pump bearings, Pump mounted on resonant surface

How to Fix / Troubleshooting

Safety first: Unplug the spa before opening any covers or touching the pump housing.

  • 1. Bleed air:
    • Open the air release valve until water flows steadily, then close.
  • 2. Check for debris:
    • Remove the filter cartridge and inspect for debris that may have passed into the pump.
  • 3. Reposition unit:
    • Place the heater pump unit on a firm, level surface with a vibration-absorbing mat if possible.
  • If noise persists or worsens: The pump bearings or impeller may be worn or damaged. Replacement of the circulation pump or entire heater pump unit is recommended.
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Repair Difficulty

Hard 4/5

Required Part

Circulation Pump Assembly
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