What It Means
Spa Not Heating
Likely Causes
- Flow switch open due to dirty filter
- Heater relay or element fault
- Temperature sensor issue
- Spa pack in economy/sleep mode
- Breaker/GFCI issue
Next Checks
- Remove filter briefly only as a diagnostic if safe; replace/clean if flow returns
- Confirm mode and setpoint
- Check for flow/pressure error on display
- Electrical heater checks require qualified service
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 Hot Tubs / Spas 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.