Normally operating boiler Low

Boiler Fault Code Normally operating boiler

Also written as NORMALLYOPERATINGBOILER — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code Normally operating boiler 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 is currently working as it should and is simply communicating that it is in normal operating mode for the season you have selected. (As reported on Biasi Riva Compact 24S)

Pick your boiler brand for the Normally operating boiler fix

Source

Information for the Normally operating boiler 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