i have turned power off to valve but it remains in mid position I think. I have a new valve ready to replace this old one as soon as my plumber mate has time but it is frustrating thinking it could just be a wiring fault. Just incase anyone knows the correct wiring this one is wired as follows...
I have been asked to look at a heating system which has never worked properly. Having checked all components of the Y-plan I am only to figure out if the mid position is wired correctly. the problem being is that it is wired in a five core flex containing four black numbered cores and an earth...
