What It Means
Stack Flue Limit
Likely Causes
- Blocked flue or exhaust outlet
- Recirculating exhaust gases back into unit
- Combustion air starvation in enclosed space
Next Checks
- Clear any debris or obstruction from flue outlet
- Check installation clearances (minimum 18" above unit top, 12" from sides)
- Ensure adequate combustion air supply — sealed equipment rooms need dedicated air vents
- Inspect for any nearby walls or structures causing exhaust recirculation
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 Sta-Rite 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.