BoilerFaultCodes Complaints of noise - 3 Medium
Boiler Fault Code Complaints of noise - 3
Also written as COMPLAINTSOFNOISE3 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code Complaints of noise - 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 struggling to control its internal temperature correctly, which is causing it to rattle or vibrate as it tries to regulate the heat. (As reported on Chaffoteaux Flexiflame 140)
Pick your boiler brand for the Complaints of noise - 3 fix
Source
Information for the Complaints of noise - 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