BoilerFaultCodesThe 3 most common faults
01
L2 High DIY-safe
Your boiler has stopped running because it has locked itself out, usually because it can't draw enough oil or light the flame.
What to try first
Check that you have enough oil in your storage tankEnsure the oil supply valve is fully openPress the illuminated reset button on the burner once
02
03
on the Firebird Envirogreen
Oil nozzlePhotocellFuel pumpOil filter
Based on parts cited in our fault code database. Your engineer will confirm what's actually needed after diagnosis.
Call a Gas Safe engineer if…
- You can smell gas or see signs of a leak
- The Firebird shows an Emergency or High severity code
- The boiler keeps locking out after repeated resets
- You've tried the DIY checks and the fault hasn't cleared
- There's visible water leaking from the boiler
- The flame is yellow or orange instead of blue
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