PSoC
PDC Spas Pressure/flow switch open when pump is running

Display shows PSOC or PS indicating pressure switch open with pump 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

Failed pressure switch on heater manifold, Low flow due to clogged filters, Air lock in plumbing, Incorrect pump speed or programming

How to Fix / Troubleshooting

Safety first: Turn off power at the GFCI breaker before handling plumbing or wiring.

  • 1. Clean filters: Remove and rinse PDC Spas filters thoroughly. Test briefly with filters removed to see if PSOC clears.
  • 2. Bleed air: Loosen pump unions to release trapped air, then retighten.
  • 3. Inspect pressure switch: Locate the pressure switch on the heater manifold. Check wiring connections and look for leaks around the switch body.
  • 4. Replace pressure switch: If flow is strong but PSOC persists, replace the PDC Spas-compatible pressure switch, ensuring proper orientation and sealing.

If the error remains after switch replacement and confirmed flow, the control board may be misreading the pressure circuit and should be evaluated by a technician.

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Repair Difficulty

Medium 3/5

Required Part

PDC Spas pressure switch
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