Hi all Im really having trouble working out how to operate my Vaillant Ecotec Pro 24 boiler through my Danfoss TP5000 si thermostat. So far the boiler has been in summer mode since it was installed 3 months ago but now with the cold coming I have tried to set up the programmable thermostat. When the boiler was on summer mode if heating was required I just turned the heat up via the boiler interface. Now I have set the thermostat to operate the heating from the thermostat in the living room rather than having to go up stairs to turn on/off the heating. According to the boiler manual if I want to use the thermostat I should but the temperature of the heating to maximum in order to control the heating through the stat. Unfortunately this doesn't seem to work. If the heating is turned on by the boiler and then I turn down the required Temp by the stat nothing happens, the boiler just stays on. If I then turn the boiler down and then increase the temp required at the stat nothing happens. Has any one installed or used this combination of equipment before that could help me please?????