Hi Dan,
Sorry to resurrect an old thread. But just wondered how this all went? Assuming you followed through with it ... I am considering getting a sparky to fit one for me. Did the sonos stand up OK to all the steam too?
Hi wondered if I could get some advise please. I have a vaillant eco tec pro 28 too. The connection from the boiler to the current thermostat heat link equivalent looks like the photo below. I only have 4 wires heading off to the boiler and it seems 3 of them are live neutral and earth, so I...