3 flashes green High

Boiler Fault Code 3 flashes green

Also written as 3FLASHESGREEN — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code 3 flashes green appears across 3 boiler brands and 6 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler has stopped because it cannot maintain a steady flame, meaning it will currently provide no heating or hot water. (As reported on Potterton Apollo)

Pick your boiler brand for the 3 flashes green fix

Baxi 3 flashes green 4 models Main 3 flashes green 1 model Potterton 3 flashes green 1 model

Source

Information for the 3 flashes 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 7 July 2026