Thanks for the info. I have had another check, and the pressure was on 0 so I increased it to 1 and the water was expelled straight out of the over flow. So I guess the Expansion vessel is broken.
Thanks :)
Hi,
I have moved into a house which has a combi-boiler which is around 5 years old. The house it\\\'s self is 80 years old. The boiler is wall mounted in a down-stairs room. Over the past few weeks the water pressure in the boiler keeps dropping, and on close inspection it would appear...