Recently seen a slew of threads relating to failure of home automation and the difficulty in fixing it or even getting parts for it. Like the OP with a blown coffee machine PCB, or the Aqualisa (I am getting allergic to this brand !) failed processor - why not save yourself a lot of grief by getting a mixer with a simple wax cartridge. Do we really need digital electronics even for a shower ? Did any professional or domestic coffee machine in Italy upto about 90s have any electronics ?, but they made the very best espresso that I can remember. In other coffee growing parts of the world, I have tasted excellent coffee made without any machinery, just a filter However the most common thread is digital controls for CH systems. Modulating controllers yes but do we really need blue tooth or WiFi controlled TRV. more to go wrong as i doubt if any of these have fail safe modes. Once properly balanced, my relatively simple programmable thermostat keeps the entire house at a comfortable temperature and TRV never come into operation. there used to be a joke around that Americans spent millions developing a ball point pen that can work in zero gravity of space or under water ( yes, they do exist and you can still buy them) but the Russians simply went to a shop and bought a box of pencils. perhaps we need to remove automation where it’s not really needed or wanted !