What It Means
Water Temperature Sensor Fault
Likely Causes
- Water temp sensor (thermistor) failed open or shorted
- Corroded sensor wiring connector
- Moisture in control board connector
Next Checks
- Test sensor resistance — JXi sensor reads ~10kΩ at 77°F (25°C)
- Check sensor wiring harness connector for green corrosion
- Replace sensor if resistance is infinite (open) or near zero (short)
Verify Before Repair
SplashLens is a field reference, not a repair guarantee. Confirm the visible code, exact model, and current manufacturer procedure before replacing parts, bypassing safeties, or quoting a customer.
SplashLens is independent and is not affiliated with Jandy / Zodiac or other equipment manufacturers.
Use SplashLens At The Pad
Manual error-code lookup works after the app has loaded once. AI scan features require internet and should be treated as a second set of eyes.