What It Means
High Temperature Limit
Likely Causes
- Inadequate water flow
- Dirty filter
- Hi-limit switch tripped
- Scale buildup in heat exchanger
Next Checks
- Check pump running and flow rate
- Clean or backwash filter
- Open all return valves fully
- Allow heater to cool 15 minutes before reset
- Inspect heat exchanger for scale buildup
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 Pentair 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.