BoilerFaultCodes 306 FA Emergency
Boiler Fault Code 306 FA
Also written as 306FA — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 306 FA appears across 1 boiler brand and 3 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler has detected a flame signal even though it has commanded the burner to turn off, indicating it cannot safely confirm the fire has gone out. (As reported on Worcester Bosch Greenstar CDi Compact)
Pick your boiler brand for the 306 FA fix
Source
Information for the 306 FA 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