BoilerFaultCodes 7.i High
Boiler Fault Code 7.i
Also written as 7I — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 7.i appears across 1 boiler brand and 3 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 inside your heating system has become too high, causing a safety valve to release water to prevent damage. (As reported on Chaffoteaux Celtic 2 24 Rsc)
Pick your boiler brand for the 7.i fix
Source
Information for the 7.i 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