BoilerFaultCodes FAIL POINT J High
Boiler Fault Code FAIL POINT J
Also written as FAILPOINTJ — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code FAIL POINT J appears across 1 boiler brand and 4 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler has detected a problem with how air and waste gases are moving through the system, causing it to shut down for safety. (As reported on Worcester Bosch Greenstar Si)
Pick your boiler brand for the FAIL POINT J fix
Source
Information for the FAIL POINT J 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