I’m trying to add c wire to furnace to run a WiFi thermostat but don’t know where to hook up c wire to get power to turn on thermostat i have 2 extra wires just don’t know where to put one them to get power
1 Answer
Look for the junction of brown wires and attach your C wire to that
On the wiring diagram for your furnace, the brown wires are all C wires, and they come together at a junction that should be somewhere near where the mains wires come in. Connect your C wire (which can be any unused wire in the thermostat cable) to that junction, perhaps with a length of extension wire (brown stranded #14 THHN/AWM will do the trick), and you'll be good to go.
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According to the diagram, there should be a brown
C
wire near the other thermostat connections. May 28, 2018 at 21:16