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  1. G

    Horstmann Electronic 7 not supplying 240v

    Thank you all. A replacement controller has sorted it out nicely.
  2. G

    Horstmann Electronic 7 not supplying 240v

    Thank you CountryFan. Yes, as the controller is getting old I'm thinking of something like worn out relay contacts. Thanks for your very quick reply!
  3. G

    Horstmann Electronic 7 not supplying 240v

    Hello all. I'd be grateful for some advice with my mother's hot water system which is no longer working. She has a Horstmann Electronic 7 controller wired to two immersion heaters in a Santon unvented water heater. Neither immersion heater is working and I've checked that the settings on the...
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