PSo
Dynasty Spas
Pressure Switch Open Fault
Display shows PSo or PSO, indicating pressure switch open when it should be closed.
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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
Insufficient water flow to close pressure switch, Failed or stuck-open pressure switch, Loose pressure switch wiring
How to Fix / Troubleshooting
Safety first: Turn off power before servicing.
- Clean filter and check water level: Ensure proper water level and a clean Dynasty Spas filter cartridge.
- Inspect pressure switch: Locate the pressure switch on the heater manifold. Check for leaks, cracks, or loose wires.
- Test with jumper (advanced): For brief testing only and with caution, a technician may temporarily bypass the pressure switch to confirm diagnosis. Do not operate the spa long-term with the switch bypassed.
- Replace pressure switch: If confirmed faulty, install a new pressure switch rated for your Dynasty heater assembly.
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Repair Difficulty
Hard
4/5
Required Part
Heater Pressure Switch
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