Boiler Fault Code Burner reset light orange/green alternate flash (0.5s)
Also written as BURNERRESETLIGHTORANGEGREENALTERNATEFLASH05S — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code Burner reset light orange/green alternate flash (0.5s) appears across 2 boiler brands and 2 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler has stopped working because its internal computer chip has suffered a permanent memory failure and can no longer control the heating process. (As reported on Worcester Bosch Danesmoor)
Pick your boiler brand for the Burner reset light orange/green alternate flash (0.5s) fix
Source
Information for the Burner reset light orange/green alternate flash (0.5s) 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 7 July 2026