BoilerFaultCodes 6 yellow Low
Boiler Fault Code 6 yellow
Also written as 6YELLOW — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 6 yellow 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 received a request to provide heat and is now attempting to start the internal fan to begin the ignition process. (As reported on Ferroli Combi 77 FF Popular)
Pick your boiler brand for the 6 yellow fix
Source
Information for the 6 yellow 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