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? TerryR
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 syte...
