BoilerFaultCodes 2948 B High
Boiler Fault Code 2948 B
Also written as 2948B — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 2948 B appears across 1 boiler brand and 12 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 keep its flame lit during operation, which is causing it to stop and restart frequently. (As reported on Worcester Bosch Greenstar 8000 Life/Style)
Pick your boiler brand for the 2948 B fix
Source
Information for the 2948 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