BoilerFaultCodes Red flashing running lamp High
Boiler Fault Code Red flashing running lamp
Also written as REDFLASHINGRUNNINGLAMP — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code Red flashing running lamp 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 lost water pressure and has shut down as a safety precaution. (As reported on Glow-worm Ci Range)
Pick your boiler brand for the Red flashing running lamp fix
Source
Information for the Red flashing running lamp 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