BoilerFaultCodes 10 bar High
Boiler Fault Code 10 bar
Also written as 10BAR — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 10 bar 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 has detected that the water pressure within the hot water system is too high and has stopped operating to prevent damage. (As reported on Keston R-sm 20 FB)
Pick your boiler brand for the 10 bar fix
Source
Information for the 10 bar 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 7 July 2026