Error Code
Sn1 / Sn3 error code — Jacuzzi spa
Always cut power at the breaker before opening the spa pack or touching wiring. Spa equipment runs at 120/240V and can be lethal. If you are unsure, hire a licensed spa technician.
Sn1/Sn3 on a Jacuzzi is a hard sensor circuit failure. The harness and connectors fail as often as the sensors themselves.
What Sn1 / Sn3 means
Temperature sensor open or shorted.
Diagnose in order
- Power-cycle once
- Inspect the sensor harness
- Replace the failed sensor — many techs do both at once
Likely failed parts
Frequently asked questions
Related codes & guides
Not sure which part failed?
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