What It Means
Stack Flue Temperature Fault
Likely Causes
- Blocked or restricted flue exhaust
- Recirculating combustion gases
- Combustion air restriction
- Dirty burner
Next Checks
- Clear any debris or nest from flue outlet
- Check clearances per installation manual
- Inspect burner tray for carbon / debris
- Ensure adequate combustion air — sealed equipment rooms need air vents
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.