2 Wires go to furnace Y

[ptown]

hello. 

I have a gas furnace and there are 2 wires on the furnace board Y. There is no C wire on the wall control board so I bought a Nest Power Connector. Does anyone know how to do this?

[Patrick_Caezza · Accepted solution]

@ptown 

You'll see two brown cables at the terminal block in your furnace.

One will have two wires (white and red) connected to the Y and R C terminals. This cable goes to the outdoor evaporator unit and turns it on and off.

The other brown cable is connected to your thermostat and is the wire you will use to connect the Power Connector. Just follow the instructions provided with the device.

[ptown]

Thank you !