Perfect No Common Wire Nest
I wound up switching to honeywell s rth9580 wi fi thermostat fig.
No common wire nest. The nest is colorblind. Unlike other wires connected to your thermostat a common wire doesn t control heating or cooling functions. For instance the nest thermostat and the nest e thermostat can usually run without a common wire see below for more information.
2 instead of going with another nest. I measured that there is no current between rc and rh. Nest thermostat no common wire nest thermostat needs no common wire problem solved how to connect the nest thermostat without a common wire.
I tried connecting a common wire from the heating system but then nest complained that there was no power on common and refused to start. There is no official color code for the c wire. Nest common wire transformer.
It has no idea what color your wires are. Buy me a coffee. I think this is because in cooling mode nest is looking at rc and getting no power to common because they are separate circuits.
This means they can run entirely without a common wire which makes installation a lot easier. The cutesy little nest screen will show wire colors but it s wild guessing based on commonly used wire colors. In theory the new cable with a common wire would solve any problems and the system.
It only provides constant power to your thermostat. Https amzn to 2gr6li4 nest thermostat temperature sensor. One of the m.