There were only 3 wires attached, to terminals one two and three. In the instructions inside the casing for the old one it says "always connect neutral to 4". The unit it's self has a wire running from terminal 2 where neutral was connected to terminal 4. This wire looks factory fitted, runs...
Hi there, new on here so hopefully I have put this in the right place!
Basically I need to replace my ancient room thermostat that has stopped working. I have a conventional boiler with a hot water tank in the loft and the boiler heats both hot water and central heating.
I have removed the...