Glow Worm 30CXi pressure problems Help and information on all topics relating to your central heating, air conditioning and ventilation issues.

[quickshaun]

Hi my 30cxi has suddenly started losing pressure it takes around 36 hours for the pressure to drop from 1 bar to 0.

I have checked all the accessible joints under my floor and I haven't noticed any water marks in my ceilings.

What I have noticed is that the pressure doesn't seem to rise above 1 bar even after I have had the heating on for some time.

Also there is no water escaping from the 'blow off' pipe outside.

I would be grateful for any advice on the problem.

Thanks in advance.

[htg engineer]

If the pressure definately doesn't rise
and there's no leaks from the pressure relief discharge pipe then it points to a leak somewhere in the system.

Is this a condensing boiler ?

The secondary heat-ex sometimes splits and you can lose the pressure via the condensate discharge pipework. Hard to diagnose though - as when the boiler is on there'll be water coming from the exhaust gases.

If the boiler is under warranty - get the manufacturers out