N/A Unknown

Boiler Fault Code N/A

Also written as NA — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code N/A appears across 5 boiler brands and 16 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Pick your boiler brand for the N/A fix

Biasi N/A 11 models Heatline N/A 2 models Ideal N/A 1 model Vokera N/A 1 model Worcester Bosch N/A 1 model

Source

Information for the N/A 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 31 August 2026