Michael Phelps Spas Jet Pump Bearing or Motor Failure

Loud grinding or screeching noise from pump area when jets are on

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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

Worn motor bearings, Water intrusion into motor, Misaligned pump mounting, Debris in pump wet end

How to Fix / Troubleshooting

Safety: Turn OFF power at the breaker before touching the pump.

  • Locate noise source: Remove the equipment bay panel and run the spa briefly to identify which pump is noisy (Pump 1, Pump 2, or circulation pump).
  • Check for debris: With power OFF, remove the pump wet end faceplate (if accessible) and inspect the impeller for debris. Clear any obstructions.
  • Assess motor condition: If the noise is clearly from the motor and not the wet end, the bearings are likely failing.
  • Replace pump or motor: For most Michael Phelps Spas, replacing the entire pump assembly with an OEM-compatible unit is the most practical solution. Shut power OFF, close slice valves, disconnect unions and wiring, swap the pump, then reopen valves and bleed air.
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Repair Difficulty

Hard 4/5

Required Part

Jet Pump Assembly
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