Replacing an UP2 controller

Trying to replace an UP2 controller and switchmaster thermostat. Wired in multiple times but I don’t know where the below wires go on the Tado controller;

1 (blue with brown sleeve)
3 yellow wire
4 red (CH NO?)


  • Have you reached out to Tado during the installation process?

    For help from the community, best to post pictures of the controls and wiring, before and after.