PDC Spas Excessive vibration from pump or misaligned plumbing

Spa cabinet or shell vibrates excessively when jets are on high speed.

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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

Unbalanced or misaligned PDC Spas jet pump, Pump not secured to base, Rigid plumbing putting stress on pump unions, Cavitation due to restricted suction

How to Fix / Troubleshooting

Safety first: Turn off power at the GFCI breaker before adjusting pumps or plumbing.

  • 1. Check pump mounting: Verify that all pump mounting bolts are tight and that rubber isolation pads are present and not deteriorated.
  • 2. Inspect plumbing alignment: Ensure that PVC pipes align naturally with pump unions and are not forcing the pump into a twisted position.
  • 3. Clean filters and suctions: Restricted suction can cause cavitation and vibration. Clean filters and check suction covers for obstructions.
  • 4. Replace pump if needed: If the motor shaft is bent or bearings are badly worn, replace the PDC Spas pump assembly.
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Repair Difficulty

Medium 3/5

Required Part

PDC Spas jet pump
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