Sn
Dynasty Spas
General Sensor Fault
Display shows generic Sn, SNS, or SENSOR error, 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
One or more spa sensors out of range, Loose sensor connectors, Control board sensor input fault
How to Fix / Troubleshooting
Safety first: Power off the spa at the breaker.
- Reseat all sensors: Open the control pack and carefully unplug and replug each sensor connector (temperature, high-limit, and any auxiliary sensors) to clean contacts.
- Inspect cables: Look for any obvious damage to sensor wires along their routing from the heater tube or shell to the control pack.
- Check water temperature: If the water is extremely hot or cold, allow it to return to normal range and then power cycle the spa.
- Replace suspect sensors: If the error persists, replace the temperature and high-limit sensors as a set using Dynasty-compatible parts. If still unresolved, the control board may require professional diagnosis.
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Repair Difficulty
Medium
3/5
Required Part
Temperature Sensor Kit
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