Err / 108 High
Boiler Fault Code Err / 108
Also written as ERR108 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code Err / 108 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 stopped because the water pressure inside the heating system has dropped too low to operate safely. (As reported on Ariston HS Premium)
Pick your boiler brand for the Err / 108 fix
Source
Information for the Err / 108 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