Baxi fault guide
Baxi E133 and E119: what they mean
E133 on a Baxi boiler means it could not light, often because gas is not reaching it. E119 means the water pressure is too low for the boiler to run safely.
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Further work and parts are always priced and agreed before we carry on.
What it means
E133 is an ignition or gas supply failure: the boiler tried to light and could not. E119 is low system pressure: the boiler will not run until the pressure is restored.
Common causes
- E133: gas supply interrupted or prepayment meter out of credit
- E133: frozen condensate pipe, ignition or gas valve fault
- E119: pressure has dropped, often from a leak, a recently bled radiator or a faulty pressure relief valve
- E119: expansion vessel needs recharging
Safe checks you can do
- Check your gas supply. Do your hob or gas fire work? If you have a prepayment meter, check it has credit and the emergency credit hasn’t run out.
- In freezing weather, check the white or grey plastic condensate pipe that runs outside to a drain. If it is frozen, pour warm (not boiling) water along it, then reset the boiler.
- Check the pressure gauge on the front of the boiler. With the heating cold, it should usually read between 1 and 1.5 bar. For E119, see our guide to a boiler losing pressure.
- Reset the boiler once using the reset button or dial (check your user manual). If the code comes straight back, stop resetting. Repeated resets won’t fix it and can make the fault harder to diagnose.
When to call an engineer
If the checks above don’t clear it, or the fault keeps coming back, the boiler needs a Gas Safe engineer to diagnose it. Our diagnostic visit is £144 including VAT, covering attendance and up to the first hour. We tell you the repair price before doing any further work.
When you call, tell us the boiler make and model, the exact code on the display and what you have already tried.
Other guides
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