BoilerFaultCodes E118 High
Boiler Fault Code E118
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code E118 appears across 2 boiler brands and 9 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 working because the water pressure inside the system has dropped too low to operate safely. (As reported on Baxi 600 Combi (range))
Pick your boiler brand for the E118 fix
Source
Information for the E118 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