Combi DHW temperature.

Discussion in 'Plumbers' Talk' started by jayktee, Feb 13, 2020.

  1. jayktee

    jayktee New Member

    A friend has a Vaillant EcoPlus 824. With the DHW set at 50C and 'C' set on, it sits at 50, but when a hot tap is opened it creeps up to around 68C and the water is far too hot. No codes are showing. Has the sensor on the plate heat exchanger gone a bit off? It appears that it will throw a code for open or shorts. Any suggestions?
  2. The Teach

    The Teach Well-Known Member

    The temperature displayed is the internal primary heated water being pumped around the boiler via a plate heatexchanger to produce domestic hot tap water.
    The temperature is boiler water,not the water delivered to the tap's etc. well thats how they usually work.


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