Re-Pressurising a Baxi Duo Tec

10 Oct 2010
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United Kingdom

I have just bled the radiators on my central heating system and caused the water pressure to drop below 0.5 bar. My Baxi Duo Tec 28 HE boiler now shows error code E119 as expected.

My problem is that when I open the valves on the refill pipe nothing happens so I can't re-pressurise the system.

Have I missed something?


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Panic over!

Whilst sitting here reading some of the other threads my boiler fired up. What ever was stopping the cold water going into the system must have cleared itself and the pressure rose to just under 1 bar. The symptoms would indicate low mains pressure but my mains pressure is ok and even if its low it should have been enough to over come the low pressure in the system.

Oh well, thanks for looking anyway!


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do you have the tap type filling loop with the circular heads? Make sure you open the left hand valve fully, then the right as in the video. the non return valves can sometimes stick. a sharp bang with a spanner on the left hand valve can sometimes be enough just to free it. If your boilers under warranty give heateam a call.

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