I installed my second Nest thermostat recently, this one was a little more involved because it was for a 7 wire heat pump.

20120901-205330.jpg The original wiring looked like this.

20120901-205451.jpg The Nest web site recommended this wiring. The only issue is that the Nest does not support a manual emergency heat wire so I had to leave that off. The Nest will still use emergency heat when necessary so I was not concerned about it.

20120901-205558.jpg My first attempt did not get all the wires in correctly.


20120901-205812.jpg After my first fix it still indicated an error.


20120901-210012.jpg After the fix the app showed it working.

20120901-210205.jpg Having 2 Nests make it possible to track usage throughout the house which was my goal.