BoilerFaultCodesBaxi 119 Fault Code
The Baxi 119 fault code means: your boiler has stopped working because the water pressure in the central heating system has dropped too low to operate safely.. It appears on 2 Baxi models in our database.
Technical description: System pressure too low
DIY fix possible
Locate the external filling loop, which is a silver braided hose usually found underneath the boiler or near the hot water cylinder.Slowly open the one or two valves on the filling loop until you hear water flowing.Watch the pressure gauge and close the valves tightly once the needle reaches between 1 and 1.5 bar.
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Baxi models that show the 119 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Baxi 119 fault code information on this page is sourced and cross-checked against the official Baxi service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026