Recent content by misscookie

  1. M

    DHW not coming to temperature on new boiler - cycles down every 45 seconds

    That does not appear to be happening as the flow temp never gets above 50. It just seems that the new boiler can’t cope with the speed of the flow rate upstairs when the taps are turned up. Is there no way of adjusting the speed of the flow rate on the boiler so that it better copes with the...
  2. M

    DHW not coming to temperature on new boiler - cycles down every 45 seconds

    I’ve just gone round all the upstairs hot taps running each very slowly for a couple of minutes. At this very slow rate the boiler does actually reach temperature and the water stays consistently hot. On our main shower turned down to a very low flow it also stays more or less consistently warm...
  3. M

    DHW not coming to temperature on new boiler - cycles down every 45 seconds

    Yes it’s a combi boiler and still under warranty - it’s only been in a few months and we never had this issue with the previous boiler. It started immediately with the new one. From the DHW sensor readouts on the app, the water never actually leaves the boiler at temperature - it only ever gets...
  4. M

    DHW not coming to temperature on new boiler - cycles down every 45 seconds

    Thank you both very much. I should have mentioned yesterday I followed a tutorial on measuring the flow rate out of some of the upstairs taps and came out with a whopping 15 LPM! It is fairly fast… but was even faster before the new boiler. None of the taps have been changed - only the boiler...
  5. M

    DHW not coming to temperature on new boiler - cycles down every 45 seconds

    Hello! I have a Viessmann Vitodens 050-W 25kw boiler which was installed in the summer and have had the same trouble with it ever since. Aside from one of the radiators no longer working, which the plumber suggests is unrelated, the central heating is otherwise fine. But the upstairs hot water...
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