Thanks for your reply sadly I disconnected the previous stat and because it bore no resemblance to the new one did not pay attention. The mains feed has a live, neutral and earth the pump has the same feed live neutral and earth. The earths both go to the pipework leaving just lives and neutral...
Please help.
My wireless stat packed up for my underfloor heating, so bought a Salus RF 500 to replace it, but the wiring is completely different.
The underfloor heating is run off my combi via a manafold. There is a pump on the manifold which needs to be turned on and off via the stat for the...