How much does it cost to fix Baxi error code 119?

Typical repair cost for the Baxi 119 fault is £0-120 including labour.

119 High

Baxi 119 Fault Code

Q: What does the Baxi 119 fault code mean?

Your boiler has stopped working because the water pressure in the central heating system has dropped too low.

The Baxi 119 fault code means: your boiler has stopped working because the water pressure in the central heating system has dropped too low.. It appears on 26 Baxi models in our database.

Technical description: System pressure too low

What causes the Baxi 119 fault?

This fault occurs when the water pressure inside your heating system falls below the minimum level required for the boiler to operate safely. The most common reason is a small leak somewhere in your radiators or pipework, but it can also happen if you have recently bled your radiators without topping the water back up.

This issue often appears when you turn your heating back on for the first time in autumn, as the system remains idle over summer and small leaks become apparent.

Typical repair cost £0-120 (including labour)

DIY fix possible

Locate the filling loop (usually a silver flexible hose) underneath your boiler.Slowly open the one or two taps/levers on the hose until you hear water flowing.Watch the pressure gauge and close the taps 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 27 April 2026