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    Nest 3rd Gen - wiring question

    Hahaha ... brilliant. Thanks for the input.
  2. D

    Nest 3rd Gen - wiring question

    Hi, I have a Myson programmer installed - with a Honeywell T40 thermostat (connecting back to a Potterton Suprima 50L ... on my 3rd PCB in 10 years!!!!). I'm looking to replace the Myson with a Nest 3rd Gen (UK with heatlink). The Myson has live / neutral - and then the black and grey are...
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