BoilerFaultCodesBaxi E19 Fault Code
The Baxi E19 fault code means: your boiler has detected that the water pressure in your system is incorrect and it cannot safely maintain the correct level.. It appears on 1 Baxi model in our database.
Technical description: Fault in filling system
DIY fix possible
Locate the external filling loop, which is a silver braided hose connecting two pipes beneath the boiler.Open the small valve or taps on the filling loop to allow cold mains water to enter the system.Watch the pressure gauge on the front of the boiler and close the valves once the needle reaches 1.5 bar.
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Gas Safe Register →Baxi models that show the E19 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Baxi E19 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 27 April 2026