BoilerFaultCodes 2949 B High
Boiler Fault Code 2949 B
Also written as 2949B — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 2949 B 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 struggling to detect a flame when it tries to work at full power, meaning it cannot provide consistent heating or hot water. (As reported on Worcester Bosch Greenstar 2000)
Pick your boiler brand for the 2949 B fix
Source
Information for the 2949 B 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