How To Find C Wire For Thermostate In Attic

C wire from furnace circuit board going to thermostat source.

How to find c wire for thermostate in attic.

Step 8 install the thermostat box cover and use the screwdriver to set the thermostat so that the fan will kick on when the attic reaches 105 degrees. Here is a picture gallery about attic fan thermostat wiring diagram complete with the description of the image please find the image you need. 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. Wait for any cooling or heating to stop then turn off your furnace ac breaker.

Turn your thermostat to the off position. Kyle i used the blue wire that goes to my ac unit. The c or common wire can make or break your thermostat installation. 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.

If you observe the terminals you can see two wires are tapped from c terminal. 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. 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.

Hope that helps pat patm6 apr 4 15 at 21 42. Here s why the c or common wire can be an important part of your smart thermostat. Here s what you need to know. On the c wire adapter s thermostat side press down a tab to open the corresponding terminal.

Look for a wire connected to a terminal labeled with a c on the thermostat. This will convert g into c and y into k. Here s how to determine if you have a c wire thermostat. G wire c terminal.

Detach your current thermostat from the wall. As was mentioned you can connect to any of the blue wires. Insert the labeled wires to the following terminals. 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.