BoilerFaultCodesBaxi 119 Fault Code
The Baxi 119 fault code means: your boiler has stopped working because the water pressure inside the heating system has dropped too low to operate safely.. It appears on 4 Baxi models in our database.
Technical description: System pressure fault
DIY fix possible
Locate the external filling loop, which is usually a small silver braided hose connecting two pipes under the boilerOpen the valves at both ends of the hose to allow mains water into the heating systemWatch the pressure gauge on the front of the boiler until the needle reaches the green zone (typically between 1.0 and 1.5 bar)Close both valves tightly and remove or disconnect the filling loop if required
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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 31 August 2026