BoilerFaultCodesBaxi E119 Fault Code
The Baxi E119 fault code means: your boiler has lost water pressure and has stopped working to protect itself from damage.. It appears on 8 Baxi models in our database.
Technical description: Water pressure switch error – not operated.
What causes the Baxi E119 fault?
This fault occurs when the water pressure inside your heating system drops below a safe level, causing the boiler to shut down to prevent overheating. The most common reason is a small leak in the pipework or radiators, though it can also happen if you have recently bled your radiators and haven't topped the water back up.
This fault is frequent in autumn when homeowners turn their heating back on for the first time or bleed their radiators to prepare for winter.
DIY fix possible
Locate the filling loop (the flexible braided hose) underneath or near the boiler.Slowly open the tap or valve(s) on the loop while watching the pressure gauge.Close the tap or valve(s) tightly once the gauge reaches between 1 and 1.5 bar.
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Baxi models that show the E119 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Baxi E119 fault code information on this page is sourced and cross-checked against the official Baxi service / installation manuals for each affected model.
- Baxi Duo-tec Combi ErP manual (PDF)
- Baxi Duo-tec Combi GA manual (PDF)
- Baxi Duo-tec Combi HE manual (PDF)
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026