BoilerFaultCodes Failure at point O High
Boiler Fault Code Failure at point O
Also written as FAILUREATPOINTO — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code Failure at point O 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 continues to fire even after you have turned off your hot water tap, which can cause the internal temperature to rise too high. (As reported on Worcester Bosch 24CDi BF)
Pick your boiler brand for the Failure at point O fix
Source
Information for the Failure at point O 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