By transformer are you talking about the power adaptor? The adapter that came with the Rachio was not working so I did use a different one. Also the new issue is zones are now powering on in their own. My neighbor just texted me and said one has been on for about an hour. This thing is going a bit crazy. I may just need to return it and go back to the Hunter Xcore. Disappointing as I am a huge automation fan.
