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  1. J

    Worcester cdi rsf hot water problem

    Hi all Just a quickie as I have a problem with my combi on the hot water What should roughly the temperature's be on the flow and return a plate heat exchanger? The hot water runs ok and then runs cold I'm thinking it is the plate heat exchanger blocked, or possibly a thermistor...
  2. J

    W Plan hteating question?

    The old W Plan, 3 port diverter valve. Is it true that you can't have heating on it's own UNTIL the hot water cylinder is up to temperature, even if you don't want the HW on at that time? From the diagram the power to the brown wire of the 3 port valve can't get there unless h/w cylinder is up...
  3. J

    Diverter Valve question

    Do the newer motor powered diverter valves in combis (A-rated boilers) that use a flow turbine/sensor as well for the Hot water, usually rest in hot water mode, and the pin come out in heating mode?
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