If you have a FAD2 or Sensaphone Cottage Sitter please view the below diagram to see how to wire it to remotely switch your home between two thermostats.

Cottage Sitter Wiring


  1. admin

    Hi Jim, the above diagram is fixed now and should work for you. With the FAD2 the T1 COM T2 terminals are the same as the NO C NC terminals on this diagram. So you can see how to wire both thermostats into your furnace using the 24V output.