How To Find C Wire For Thermostate In Attic

Detach your current thermostat from the wall.

How to find c wire for thermostate in attic.

G wire c terminal. On the back plate you will see a number of letters. Turn your thermostat to the off position. How to wire two new attic fans to a new switch box with power pertaining to attic fan thermostat wiring diagram image size 939 x 712 px and to view image details please click the image.

I chose the one going to the ac unit because it was already next to the wires to the thermostat and had a wire nut connection to a wire going outside. The easiest way to check if your existing thermostat has a c wire already installed is to take the front of the thermostat off and look. Insert the labeled wires to the following terminals. Wait for any cooling or heating to stop then turn off your furnace ac breaker.

You can identify verify the common wire by examining this circuit board. The cover is either held onto the back plate by snap clips or one or two small screws. C wire from furnace circuit board going to thermostat source. Kyle i used the blue wire that goes to my ac unit.

As was mentioned you can connect to any of the blue wires. Here is a picture gallery about attic fan thermostat wiring diagram complete with the description of the image please find the image you need. Take a look at the 2 images given below. On the c wire adapter s thermostat side press down a tab to open the corresponding terminal.

This will convert g into c and y into k. If there is a wire going to letter c you have a c wire. The c or common wire can make or break your thermostat installation. If you observe the terminals you can see two wires are tapped from c terminal.

Look for a wire connected to a terminal labeled with a c on the thermostat. Connect the black thermostat wire to the black cable wire the white thermostat wire to the white cable wire and the ground wire to the green ground screw in the box. Hope that helps pat patm6 apr 4 15 at 21 42. Here s how to determine if you have a c wire thermostat.