BoilerFaultCodes Green LED illuminated Low
Boiler Fault Code Green LED illuminated
Also written as GREENLEDILLUMINATED — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code Green LED illuminated appears across 1 boiler brand and 1 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler is working perfectly and is currently in standby mode, simply waiting for you to turn on a tap or adjust the heating. (As reported on Halstead Finest Gold)
Pick your boiler brand for the Green LED illuminated fix
Source
Information for the Green LED illuminated fault code is sourced from the official service / installation manual for each model that displays it. Read more about how we source fault codes →
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026