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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 powerenter image description hereenter image description hereenter image description hereenter image description hereenter image description hereenter image description hereenter image description here

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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.

  • According to the diagram, there should be a brown C wire near the other thermostat connections. – Tester101 May 28 '18 at 21:16

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