It’s very interesting and I’ll look into these zone valves and see whether they are sloppy or free. Getting electricuted may be a posiblity. Its frustrating though. Thanks
Hi 2face
Thanks for the reply, I've disconnected the room stat and programmer but the boiler+pump still running away happily.
The system has been newly installed about 3 yrs ago and worked perfectly until now. Strange!!!!!!
Hi i'm new to the site and looking for help with my 4 yr old Potterton suprima 100L with Drayton wireless control system. The boiler and pump just keep on working it will not switch off, the room sta and the programmer has no effect at all. The only way to stop the system is to switch off the...