Recent content by Paulh999

Thanks for the replies, it turns out that underfloor heating has been installed in a separate part of the house which the installer has just branched off the nearest radiator. He then put in a thermostat and linked that to the heating valve. So two thermostats control one valve, as soon as the...

Hi guys. I've got something strange going on with a s-plan system with two 2-port valves, dual programmer, room stat and cylinder stat. Even when the programmer is not calling for heat there is power going to the ch valve causing the boiler to fire up. The only way to turn it off is to kill the...