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Hi, Just as an update, you were spot on, the Live 3 was the conservatory heating circuit. Once connected to terminal 1 on the backplate all started working as expected. Now to look at removing the stats from the circuit, but think(!) I'm good with that... Thanks for all your help, much appreciated.

Hi, Yes, sorry you are correct when I say three wires in the L connection of the back plate. To try and explain Live 3 a bit better. The boiler has a tap (water) and a radiator (ch) symbol on the display when fully functioning. When I remove live 3, just the tap icon displays. If I try and...

Thanks for taking the time to reply. To be honest I'm not sure if the conservatory heating was being controlled by the C27. I spoke to a Drayton support engineer who said it should be, but the CH on light never lit up when conservatory heating was on. Is there another way it could be connected...

Hi, hoping someone will be able to help me here as am certainly a novice when talking about central heating controls! I'm replacing standard heating controls for a Drayton Wiser Heat Hub 3 channel. I have a Vaillant Ecotec 810 boiler, unvented hot water tank, Honeywell C27 programmer, manual...