BoilerFaultCodes 3 green flashes Low
Boiler Fault Code 3 green flashes
Also written as 3GREENFLASHES — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 3 green flashes appears across 1 boiler brand and 27 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler has briefly lost its flame and is trying to restart itself, which is often a temporary glitch that might resolve without any action. (As reported on Baxi EcoBlue)
Pick your boiler brand for the 3 green flashes fix
Source
Information for the 3 green flashes 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