Hi all, so I had the opportunity today to purchase a honeywell 2 valve actuator. Fitted it and it works correctly thankfully. But what I have found is that when just the hot water is called the radiators are heating up. Arggh! To me it still appears that the valve does not turn to and from the same degree as the actuator. The actuator turns from \ (closed) anticlockwise to _ (Open) whereas the valve turns from _ anticlockwise to / (I have no idea which is open or closed) if that makes sense. Hence when I fit the actuator over the valve at what is meant to be closed it is partially or fully open. I think I am going to have to bite the bullet and replace the valve as well. It's a bit tricky to get to being at the back of the airing cupboard water tank. I'll see how I go first. I just can't understand why the turning circle's do not match. Is there any way this can be adjusted either on the valve or on the actuator? Thanks in advance.