BoilerFaultCodes Flashing Green Low
Boiler Fault Code Flashing Green
Also written as FLASHINGGREEN — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code Flashing Green 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 is working exactly as it should and is currently waiting for a signal from your thermostat or timer to start heating your home. (As reported on Potterton Suprima HE)
Pick your boiler brand for the Flashing Green fix
Source
Information for the Flashing Green 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