BoilerFaultCodes Red LED two flash sequence Low
Boiler Fault Code Red LED two flash sequence
Also written as REDLEDTWOFLASHSEQUENCE — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code Red LED two flash sequence 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 has been manually set to run at its lowest possible power level, usually because a technician is performing a service or safety check. (As reported on Worcester Bosch Greenstar CDi Compact)
Pick your boiler brand for the Red LED two flash sequence fix
Source
Information for the Red LED two flash sequence 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