b29 High

Boiler Fault Code b29

Also written as B29 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code b29 appears across 3 boiler brands and 5 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler has stopped working because the fan used to clear out waste gases is not communicating correctly with the main control board. (As reported on Vokera Pinnacle)

Pick your boiler brand for the b29 fix

Johnson Starley b29 2 models Remeha b29 2 models Vokera b29 1 model

Source

Information for the b29 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