What It Means
High Limit Fault
Likely Causes
- Low or no water flow
- Dirty or clogged filter (check pressure)
- Closed valves restricting flow
- Pump not running or losing prime
- Scale buildup in heat exchanger
- High limit switch failed
Next Checks
- Verify pump is running and primed
- Check filter pressure (clean if >10 PSI above normal)
- Open all water valves fully
- Backwash filter
- Check for air in system
- Test high limit switch continuity
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 Hayward 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.