Sn3
Dynasty Spas
Auxiliary Sensor Error (Cabinet/Air/Other)
Display shows Sn3 or SN3, spa may behave erratically or shut down certain functions.
Advertisements
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.
Advertisements
Possible Causes
Failed auxiliary sensor (e.g., ambient or cabinet sensor), Loose or corroded sensor connector, Damaged sensor wiring harness
How to Fix / Troubleshooting
Safety first: Turn off power at the GFCI breaker.
- Identify sensor: Consult your Dynasty Spas wiring diagram to locate the sensor labeled as sensor 3 (often an ambient or cabinet temperature sensor).
- Inspect wiring: Check the sensor harness for damage and ensure the connector is clean and fully seated on the control board.
- Bypass test (if documented): Some control packs allow temporary bypass or substitution with a known-good sensor for testing. Only perform this if you have clear documentation.
- Replace auxiliary sensor: If Sn3 persists, replace the auxiliary sensor with the correct Dynasty Spas part number.
Advertisements
Repair Difficulty
Medium
3/5
Required Part
Auxiliary Temperature Sensor
Check Price on Amazon
We may earn a commission from links on this page.
Advertisements