Recently removed my Nest (including the wiring) to paint a wall. Put everything back in place and wired it up again, exactly the same way.
When the device restarted, the Nest said my wiring/equipment had changed and the picture on the screen shows that a Y2 wire is connected even though one physically is not. I only have a Y1 wire, so why does the Nest think a wire is inserted in the Y2 slot?
Thanks in advance.
Answered! Go to the Recommended Answer.