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Hi, Thanks for the reply. The power cable doesn't go to a switch as such but into a "control board"... sorry my terminology is terrible. I've attached a photo to hopefully explain. Thanks, David

Hi folks, I thought this would be a straight forward task but have fallen at the first hurdle. I bought a replacement external security light and went to fit it yesterday. The new light only has live, neutral and earth. I've attached the wiring from the existing light. I think I'm happy with...

Hi, Just to update, I went through this earlier today - your instructions of T1 to C and T3 to NO were spot on :mrgreen: The heating appears to be responding and the house hasn't went on fire yet, so I think we're all good! Many thanks - appreciate the help.

Thanks mate, I'll wait until tomorrow morning to do it so its light. I'll give it a go after shutting the power off and report back. Enjoy your Saturday night!

Hi, Thanks for the reply. There's a second black wire connected to terminal 3 and also a red wire hiding behind the back which I won't know where it goes until I take the back plate off. I've attached a close up pic of this. Would both wires in terminal 3 be connected to 'NO' on the Nest...

Hi Guys, I'm trying to install a Nest Thermostat E and I'm stuck at the wiring when it comes to replacing the thermostat (Myson Mrt1) with the Nest Heat link. I've attached the wiring diagram from the existing thermostat, a photo of that wiring in situ, and the connections on the new heat...