PSc
LA Spas
Pressure Switch Closed When It Should Be Open
Display shows PSC or PSc, spa may not start a heating cycle.
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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
Pressure switch stuck closed, Shorted pressure switch wiring, Incorrectly adjusted pressure switch, Control board input fault
How to Fix / Troubleshooting
Safety: Turn off power at the breaker.
- Inspect switch and wiring: Locate the pressure switch and verify that its wires are not shorted together or pinched.
- Test switch operation: With no pump running, the switch should be open. Use a multimeter to confirm. If it shows continuity with no flow, it is stuck closed.
- Replace faulty switch: Remove and replace the pressure switch with a compatible part. Do not attempt to force it open mechanically.
- Check control board: If a new switch behaves the same, the control board may be falsely reading the input and should be tested by a technician.
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Repair Difficulty
Hard
4/5
Required Part
Pressure/Flow Switch
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