BoilerFaultCodesECA 430 Fault Code
The ECA 430 fault code means: your boiler has detected that the water pressure inside the system has dropped too low to operate safely and effectively.. It appears on 1 ECA model in our database.
Technical description: Dynamic water pressure is too low
DIY fix possible
Locate the filling loop under the boiler, which is usually a silver braided hose or a small tap.Slowly open the valve(s) to allow cold mains water to enter the system.Watch the pressure gauge on the front of the boiler until the needle reaches the green zone, typically between 1.0 and 1.5 bar.Close the valve(s) tightly and check for any leaks.
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ECA models that show the 430 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
ECA 430 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