Why does my hot water only work when the heating is on?
Why does my hot water only work when the heating is on? It is common for a faulty diverter valve to only become apparent in the warmer months once the central heating is not needed. If hot water only comes out of your taps when the central heating turns on, it is likely that the diverter valve is not diverting hot water properly. Is the Viessmann vitodens 100W shower Hot? I have a combi Viessmann vitodens 100w which does not give the hot water constantly, we have moved in to the house 6 months ago and when during the summer...