The c or common wire can make or break your thermostat installation.
How to find c wire for thermostat in attic.
Simply remove your current thermostat face from its baseplate and look for the terminal labeled with the letter c if this terminal has a wire attached to it you have an active c wire.
This means that you do have a c wire you just need to find the end of the lead near your thermostat.
Insert the labeled wires to the following terminals.
C wire coming into thermostat look blue wire in c terminal source in the above image a blue coloured wire is coming into terminal marked c.
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.
Here s what you need to know.
The cover is either held onto the back plate by snap clips or one or two small screws.
Check your furnace to see if you have one.
Usually c wire or the common wire will be a blue coloured wire.
A how to demonstration of wiring your xxfirestat or power attic vent thermostat.
Alternately look for thermostats that specifically say they do not require a c wire for operation.
If there is a wire going to letter c you have a c wire.
Thermostats can get this constant power through a common wire or c wire it is easy to see if you already have a c wire connected to your system.
G wire c terminal.
Here s why the c or common wire can be an important part of your smart thermostat.
If you find a c wire here it probably means that the other end is stuffed into the wall just behind the thermostat.
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.
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.
On the c wire adapter s thermostat side press down a tab to open the corresponding terminal.
You may find that a c wire connection and lead is present.
Open up the access panel and check the terminals.
On the back plate you will see a number of letters.
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.
This will convert g into c and y into k.
If you can t find the c wire or need help with the difference between a 2 wire thermostat and a 4 wire thermostat call a professional electrician.
