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Hi, I have just bought a Hive self install for a combi boiler, there is no external programmer - this is integrated into the boiler itself. Can I just replace the existing wired thermostat on the wall with the Hive receiver? I cannot see any controller anywhere near the boiler so assume that...

My Horstmann c27 got disconnected some of the wire became loose and I have no idea what goes where now, I tried to follow some online diagrams but just getting a blank display now. The connections on the back of the unit are N L 1 2 3 4 5 6. I have a fully pumped system with thermostat. There...