I have a conventional, fully pumped central heating/hot water sytem via a gas boiler and with a hot water storage tank. I have turned off the CH for the summer but kept the HW off the boiler. However when the boiler heats up the tank it also heats up the radiators.
The motorised valve on the CH sytem works OK because it is hot on the boiler side and cold on the other side. However i can feel water vibrating (circulating?) through that side. Could there be some other point where there is a cross flow between the CH and HW systems.
I have double checked the 2 way valves and they are definitely working as they should be.
It is a DIY installation by the previous owner so it looks like he has somehow interlinked the 2 circuits. Is there a likely place he could have done this which i can check without tearing the house apart?
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!