BoilerFaultCodesECA F37 Fault Code
The ECA F37 fault code means: your boiler has stopped working because the water pressure is too low for the system to run safely.. It appears on 3 ECA models in our database.
Technical description: Low Water Pressure Fault (blocking) — water pressure sensor detects low water pressure (0.4 bar); check water pressure; fill system until pressure reaches 1.5–2 bar (error clears above 0.8 bar); check valves and installation for leaks; if persists notify ECA authorised service
DIY fix possible
Locate the filling loop (usually a silver flexible hose) underneath or near the boiler.Slowly open the one or two taps/levers on the filling loop until you hear water rushing.Watch the pressure gauge and close the taps once the needle reaches 1.5 bar.Ensure the taps are fully closed and the error code should clear automatically.
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ECA models that show the F37 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
ECA F37 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 31 August 2026