BoilerFaultCodes Blue indicator light off High
Boiler Fault Code Blue indicator light off
Also written as BLUEINDICATORLIGHTOFF — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code Blue indicator light off appears across 1 boiler brand 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 no power and is completely switched off, meaning you have no heating or hot water until the electrical supply is restored. (As reported on Worcester Bosch 28i Junior)
Pick your boiler brand for the Blue indicator light off fix
Source
Information for the Blue indicator light off 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