Hi all I have a issue with my thermostat. I have had the walls plastered and took the old thermostat of the wall .. it was digital with programming on but old and dirty so wanted to just replace it. The problem is I thought it was easy enough to just get a new one.. I threw the old one away and now I really am confused as to what I can put back on I have bought just a normal dial thermostat but it's not talking to the boiler.. I have 3 wires and I assumed they were neutral live and earth .. HOWEVER all 3 wires are LIVE ...i have opened the front ofntbe boiler and detached the electric feed and all 3 wires go dead when I do this. Please can anyone help me.??