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    Vaillant ecoTEC plus - Hot water goes cold

    Hello - I also have an ecoTec plus 824 and last winter the water kept going cold, would only stay hot if I turned the taps on very slightly. Had an engineer out and he flushed the system - no change, he replaced the heat exchange, no change and then replaced re pump - that worked and the water...
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    Vaillant ecotec plus water goes cold

    hello Looking for some advice; I have a vaillant eco tec plus 824 combi boiler. Last year the hot water started running cold after a few minutes. Heaton engineer cleaned the whole system, replaced the heat exchange and the pump. The pump seemed to do the trick. It's coming up to a year since it...