BoilerFaultCodesECA 118 Fault Code
The ECA 118 fault code means: your boiler has stopped working because there is not enough water pressure in the system to operate safely.. It appears on 1 ECA model in our database.
Technical description: The water pressure is too low.
DIY fix possible
Locate the filling loop (a flexible silver hose) underneath or near the boiler.Slowly open the one or two taps/valves until you hear water entering the system.Watch the pressure gauge and close the taps firmly once it reaches between 1.0 and 1.5 bar.
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ECA models that show the 118 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
ECA 118 fault code information on this page is sourced and cross-checked against the official ECA service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026