What is a C-Wire? A common wire (C-Wire) provides Wi-Fi thermostats continuous power by connecting it to a heating and cooling system (e.g. furnace). C-Wires are required on most Honeywell Wi-Fi thermostats, with the exception of the Smart Round Thermostat (formerly known as the Lyric Round).

How do you put a C wire in a thermostat?

Quote from the video:
Quote from Youtube video: Run actual thermostat wire in the all and connect. It to the existing thermostat wire if you've got an extra wire or if you want to fish some new ones in the wall. Not a big deal there.

Where is the C wire on a thermostat?





Quote from the video:
Quote from Youtube video: But we're gonna go ahead and just pop the top off or pop the cover off your thermostat. Wherever you do that but mine has a little thing down here. And then we're have access to all the wiring.

How do you use C wire as G wire?

Quote from the video:
Quote from Youtube video: Move it over to your C as in Charlie terminal. We're going to make a jumper of a short piece of wire. And jumper between the Y and the G. And then once we hook that G up to the C.

What color is the C wire?

Blue wires

Blue wires are also called “C” wires because they are the Common wire. C wires are necessary for any “smart” thermostat that needs to be connected to a power source 24/7, regardless of your heat pump type.

How do you wire a thermostat to a furnace?





Quote from the video:
Quote from Youtube video: On the control board of the furnace. Then it goes up to the RC. And then you have the RC connecting in the thermostat. Through the load in order to power the thermostat.

Where does blue wire go on furnace?

terminal B

Blue wires are for heat pumps. This wire connects to terminal B on your thermostat.

How do you wire an old thermostat?

Quote from the video:
Quote from Youtube video: So I would put the red wire. And the R. Into either R or RC. It doesn't really matter which one I put it into because there's a jumper between R and RC. So I'll just go ahead and put it into R.