BoilerFaultCodesECA 323 Fault Code
The ECA 323 fault code means: your boiler has stopped working because the water pressure inside the system has dropped too low to operate safely.. It appears on 1 ECA model in our database.
Technical description: Water pressure 3 is too low
DIY fix possible
Locate the filling loop, which is a silver braided hose connected to two valves under the boiler.Slowly open both valves until the pressure gauge on the front of the boiler reads between 1.0 and 1.5 bar.Once the pressure is correct, firmly close both valves and check for any leaks.
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ECA models that show the 323 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
ECA 323 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