Thanks for the quick response mate,yip still trying to find out where the old bell transformer is as someone had installed a new bell but wasn't working Wonder why I do have a doorbell attached to door frame outside but never has worked
Drained down system fitted new radiator valve have now filled system again very slow in filling system back up think loads of air still in it fired boiler back up stays on for about 2 minutes then safety switch cuts in my question is also what position should the Drayton monitirised valve be in...