Where do I connect the C wire on my thermostat?
Option 1: Add a C Wire to Your Furnace Remove the access panel from the furnace and locate the thermostat wires and terminals. Connect an 18 AWG wire to the C terminal at the furnace. Next, remove the thermostat face plate. Now, run the new C wire from the furnace to the back of the new thermostat.
What is the C wire used for on a thermostat?
A C-wire, or a common wire, runs from your low voltage heating system (24v) and carries continuous power to your thermostat. In today’s electric market, most newer heating and cooling systems have C-wires, which guarantees compatibility for the installation of all smart thermostats.
Does my thermostat have C wire?
It is easy to see if you already have a c-wire connected to your system. Simply remove your current thermostat face from its baseplate and look for the terminal labeled with the letter “c.” If this terminal has a wire attached to it, you have an active “c-wire.”
Is the C wire blue or brown?
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.
Is the C-wire Green?
Blue or Black – C – Common wire, may be unused by your existing thermostat. Enables continuous power flow from the Red wire. Red – Rc – 24VAC (dedicated to cooling call) Green – G – Fan.
What is C wire required?
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).
What if there is no C-wire for thermostat?
If you don’t see a wire you can identify as the C-wire, though, don’t despair yet – you may need to look behind your existing thermostat. If your current thermostat didn’t need a C-wire, it (or a wire that can be used as a C-wire) might be rolled up inside the wall.