BoilerFaultCodesEuroterm F37 Fault Code
The Euroterm F37 fault code means: your boiler has switched itself off because the water pressure in the system is too low for it to operate safely.. It appears on 1 Euroterm model in our database.
Technical description: Incorrect system water pressure
DIY fix possible
Locate the filling loop (usually a silver flexible hose) underneath the boiler.Open the one or two taps on the loop slowly until you hear water moving.Watch the pressure gauge until it reaches between 1.0 and 1.5 bar, then close the taps tightly.
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Euroterm models that show the F37 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Euroterm F37 fault code information on this page is sourced and cross-checked against the official Euroterm service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026