BoilerFaultCodesECA E38 Fault Code
The ECA E38 fault code means: your boiler has detected a sudden drop in water pressure shortly after being refilled, which usually means there is a leak somewhere in your heating system or inside the unit itself.. It appears on 3 ECA models in our database.
Technical description: Low water pressure error 1 week after last water filling (lockout) — water leakage in plumbing or boiler; press Reset; if persists notify ECA authorised service
DIY fix possible
Check your radiators, valves, and visible pipework for any signs of water leaksTop up the system pressure using the filling loop until the gauge reads between 1.0 and 1.5 barPress the Reset button on the control panelMonitor the pressure gauge closely; if it drops again quickly, turn off the boiler and call a professional
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ECA models that show the E38 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
ECA E38 fault code information on this page is sourced and cross-checked against the official ECA service / installation manuals for each affected model.
- ECA Confeo Premix HCH manual (PDF)
- ECA Confeo Premix HM manual (PDF)
- ECA Confeo Premix HST manual (PDF)
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026