BoilerFaultCodes Excessively noisy burner - 3 Emergency
Boiler Fault Code Excessively noisy burner - 3
Also written as EXCESSIVELYNOISYBURNER3 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code Excessively noisy burner - 3 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 making an unusually loud noise because the fuel nozzles are obstructed or damaged, which prevents the gas from burning smoothly. (As reported on Chaffoteaux Flexiflame 140)
Pick your boiler brand for the Excessively noisy burner - 3 fix
Source
Information for the Excessively noisy burner - 3 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