BoilerFaultCodesECA F37 Fault Code
The ECA F37 fault code means: your boiler has detected that there is not enough water in the system to operate safely and has shut down.. It appears on 4 ECA models in our database.
Technical description: Low water pressure error.
DIY fix possible
Locate the filling loop (a flexible silver hose) underneath or near the boiler.Slowly open the valve(s) to let water into the system while watching the pressure gauge.Close the valves tightly once the pressure reaches between 1.0 and 1.5 bar.
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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 7 July 2026