horstmann 425

  1. D

    Horstmann 425 to Hive

    Hello, I’ve just moved house and found myself with a Ideal Mexico Super ideal C125 boiler, Horstmann 425 control and Sunvic thermostat. I’d like to replace the control for a hive but need some assistance with the wiring please. I’ve attached a couple of pictures. Thanks in advance! David
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