My daughter has just bought her first house which has a combi boiler. The house was a repossesion and the heating system had been drained down for a while, possibly 4-5 months before they got the house. We have filled the system back up and it runs fine. However we keep loosing pressure over a period of about 1-2 hours. We have checked for leaks at all valves and fitting under the boards but can't see any signs of a leak. We have found all routes for the pipe-work to all rads and from the boiler, but no signs of any water. We have checked the Pressure release valve pipe-work and this is also dry. Has anybody got any ideas?
I had a similar problem with a Baxi 105E - after a great deal of time looking for leaks without success I eventually found that there was no pressure in the Expansion vessel - this turned out to be a leaking valve used to pressurise the vessel - the valve is similar to ones used on a car tyre. I used a car foot pump to take the pressure back up to 1 Bar. Since then no problems.
DIY how to tutorial projects and guides - Did you know we have a DIY Projects section? Well, if no, then we certainly do! Within this area of our site have literally hundreds of how-to guides and tutorials that cover a huge range of home improvement tasks. Each page also comes with pictures and a video to make completing those jobs even easier!