hi , i have been having a few problems with my central heating / hot water
when i select h/w and c/h to on nothing happens , but when i de-select h/w the boiler fires up , tried changing tank stat but no joy , taken the actuator from the motorized v/v , it seems to be working , but i left it off and my h/w got hot , then c/h starts to get hot , do you think that it is the micro switch on the 3 way v/v and if so do i need to change the complete v/v :(