ecotec 837

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...

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...