Prr
Evolution Spas Pressure Switch or Flow Verification Error

Display shows PRR or Prr, spa may not heat and may disable pumps intermittently.

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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

Faulty pressure switch, Incorrect pressure switch adjustment, Poor water flow through heater, Wiring issue between pressure switch and control pack

How to Fix / Troubleshooting

Safety: Turn off power at the GFCI breaker before working on the pressure switch or plumbing.

  • Locate pressure switch: It is typically threaded into the heater manifold or plumbing near the heater.
  • Check for leaks and tightness: Ensure the switch is snug and not leaking. Do not overtighten.
  • Clean filter and verify flow: Clean the filter cartridge and confirm strong flow at jets and heater return.
  • Inspect wiring: Verify the pressure switch wires are firmly connected to the control pack and not damaged.

If Prr persists, the pressure switch may need replacement with an Evolution Spas-compatible part. Some switches are adjustable; incorrect adjustment can cause nuisance errors and should be set by a technician.

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Repair Difficulty

Hard 4/5

Required Part

Pressure Switch
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