BoilerFaultCodes Noisy operation Medium
Boiler Fault Code Noisy operation
Also written as NOISYOPERATION — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code Noisy operation appears across 1 boiler brand and 7 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 unusual rattling or grinding noises, which usually suggests there is trapped air in the system or a internal mechanical part is starting to wear out. (As reported on Worcester Bosch Greenstar 27CDi)
Pick your boiler brand for the Noisy operation fix
Source
Information for the Noisy operation 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