Sunrise Spas Pump Bearing or Cavitation Noise

Loud grinding or screeching noise from jet pump when running

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

Worn motor bearings, Air in pump causing cavitation, Debris in impeller, Misaligned pump mounting

Safety first: Turn off power before touching the pump.

Check for air: Bleed the pump unions to remove air and ensure the spa is fully filled.
Inspect for vibration: Verify that the pump is securely mounted to the equipment base and that rubber isolation pads are intact.
Debris check: If comfortable, remove the pump wet end and inspect the impeller for stones or debris.
Replace pump or motor: Persistent grinding indicates failing bearings; replace the pump motor or complete pump assembly.

Hard 4/5

Jet Pump Assembly

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