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  1. C

    Central Heating programmer or motorised valve ???

    CH4, thanks very much for the last post - now feel like I have a much better understanding. Honest this is final query. Whole system seems to work as you have indicated, other than voltage at Grey wire when DHW is on only - this reads 150V approx ?? ( but I am not sure if I checked this...
  2. C

    Central Heating programmer or motorised valve ???

    CH4 thanks very much for that, think I'm getting out of my depth but it will help if I now call in engineer. I checked this morning and noticed something a little strange. 1. If I advance the CH off, leaving HW on the valve return and shuts off flow to radiators. 2. If I reduce room...
  3. C

    Central Heating programmer or motorised valve ???

    Have ideal classic boiler and having problems with 3A fuse blowing in fused spur. After heating goes off can see that motor on valve ( diverter valve ? next to system pump in tank cupboard ) is not returning - so valve held open. If I turn power off at fused spur can see that valve returns, If I...
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