Hi, I have recently moved house which has a Baxi Ecoblue Advance 19 boiler retrofitted in 2018 which supplies hot water to a Santon unvented tank upstairs. I have tried to turn the water temperature down on the tank thermostat, however it does not seem to have any control cables installed at the tank, therefore i assume no feedback to the boiler. Any ideas how to control water temperature with this configuration? Cheers.