BoilerFaultCodes Hot Water Active (Green) Low
Boiler Fault Code Hot Water Active (Green)
Also written as HOTWATERACTIVEGREEN — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code Hot Water Active (Green) 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 exactly as it should and is currently heating water for your taps or shower. (As reported on Firebird Enviro Combi 26)
Pick your boiler brand for the Hot Water Active (Green) fix
Source
Information for the Hot Water Active (Green) 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