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ecotec 837

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    Valiant Ecotec Plus 837 Central heating stuck on ignoring thermostat

    Hi all, can you help ? Have a Valiant Ecotec Plus 837, the central heating runs all the time ignoring the roomstat. Hot water is fine No error codes When i look at the control panel the RAD picture is visible. When set to on via timer function the heating switches on and off but ignores the...
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    837 EcoTec Plus Making noise when full flame

    I am in need for some help on my Vaillant 837 EcoTec Plus combi boiler (installed in Dec 2009) that is making noise. Same noise as in this video. While I was decorating the house I had taken off the radiators from wall and left the thermostatic valves on closed position. After many weeks (6...
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