THANKS FOR REPLY BUT I STILL HAVE THE SAME PROBLEM - EVEN THOUGH THE DIVERTER'S BEEN CHANGED AND THE BACKPLATE
CAROLE RICHARDS, February 2010
Sounds like the diverter valve is not switching over properly, unusal for a Vaillant. could be muck in it stopping it opening and shutting. Tricky job to do better of calling someone out,
Cheers