Baxi boiler showing E119
E119 on a Baxi is low water pressure. Two minutes with the filling loop usually sorts it, free.
What it actually means
E119 means the water pressure in your heating system has dropped below about 0.5 bar, so the boiler has stopped to protect itself.
Pressure drifts down slowly in every sealed system. One top-up a year is normal. One a week is a leak.
Try this first, before you spend a penny
- 1
Check the gauge
Below 1 bar confirms it. Your target is 1 to 1.5 bar when the system is cold.
- 2
Top up via the filling loop
Open the filling loop valves slowly until the gauge reads about 1.2 bar, then close them firmly.
- 3
Reset
The code should clear once pressure is back. Some models clear it automatically.
When it is a pro job
Needing to top up more than every few months means water is escaping somewhere: radiator valve, pipework or an internal part. An engineer can pressure test and find it.
Gas Safe registered heating engineer
Typical UK range for tracing and fixing a slow pressure loss. The top-up itself costs nothing.
£90 to £250
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