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    Potterton Netaheat 10-16

    Newbie alert! There is a little silver Honeywell box just off the storage tank. If the system is gravity then I just need to remove the jumper setting from the control unit?
  2. E

    Potterton Netaheat 10-16

    4 pipes come off the boiler there is a red Grundfos "valve" is this the motorised valve?
  3. E

    Potterton Netaheat 10-16

    Where will I find that? I am a heating newbie I'm afraid!
  4. E

    Potterton Netaheat 10-16

    Hello I've been in the new place a couple of months - when I moved in the heating switched on when requested but now only the hot water works :? I replaced the Horstmann 425 control unit with a Horstmann H27 XL because the 425 was not switching the water and heating off when it was...
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