Sn1
RivieraPool
Primary Temperature Sensor Failure
Display shows Sn1 or SENS1 and spa may not heat or may shut down.
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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
Open or shorted temperature sensor, Corroded sensor connector at control board, Damaged sensor cable from rodent or mechanical abrasion
How to Fix / Troubleshooting
Safety: Turn off power at the breaker before accessing the control pack.
- Locate the sensor: Find the RivieraPool primary temperature sensor inserted into the heater tube or spa shell. Follow its cable to the control board.
- Inspect wiring: Check for cuts, chew marks, or pinched sections. Ensure the plug is fully seated on the control board and free of corrosion.
- Clean connector: If light corrosion is present, disconnect power, unplug the sensor, and gently clean the contacts with electrical contact cleaner. Reconnect firmly.
- Compare temperature reading: If your control panel shows a water temperature that is clearly wrong (e.g., 0°C or 48°C when water is lukewarm), the sensor is likely failed.
- Replace sensor: Order a compatible RivieraPool temperature sensor. With power OFF, remove the old sensor from the heater tube (some may require loosening a retaining nut). Install the new sensor, ensuring the O-ring seats properly to prevent leaks, then reconnect to the control board.
- Test: Restore power and verify that the error clears and temperature readings are reasonable.
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Repair Difficulty
Medium
3/5
Required Part
RivieraPool primary temperature sensor
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