I did all of my work in the Nest app. When I was trying to add a second
thermostat in a home which already had one set up, the Nest app
insinuated that it was trying to communicate with the "assist device"
which I believe was the first thermostat. In...
I was having a similar issue with a 3rd generation learning thermostat
when installing a second one in a new location (different address miles
away). I followed all the steps in the app but could not connect. I kept
getting the TD030 error. Then when...