How do I run a C wire to my thermostat?

Quote from the video:
Quote from Youtube video: Basically take the the plate here take your transformer. You're gonna make your connections. For everything just like they were on the thermostat that you took off with the exception of two. You.

How do you run a new C wire?

Option 1: Add a C Wire to Your Furnace

Remove the access panel from the furnace and locate the thermostat wires and terminals. Connect an 18 AWG wire to the C terminal at the furnace. Next, remove the thermostat face plate. Now, run the new C wire from the furnace to the back of the new thermostat.

What color wire goes to C on a thermostat?

Blue wires

Blue wires are also called “C” wires because they are the Common wire. C wires are necessary for any “smart” thermostat that needs to be connected to a power source 24/7, regardless of your heat pump type.

Where does the C wire connect?

If your system has a C-wire, it might be in use or just tucked away behind your current thermostat. If your system doesn’t have a C-wire, you’ll need to run a new cable from your furnace to your thermostat to install most of the modern smart thermostat models.

Why is my C wire not working?

Quick Check for an Existing C-wire:

If it has batteries, remove them. If the thermostat loses power it does not have a C-wire, and you may need an add-a-wire kit. If it doesn’t lose power, locate your breaker panel. Flip the breaker for the wall with the thermostat on it.

How do I know if my C wire is working?

You should see 24 Vac. It could be as high as 29 Vac when nothing is running, and nothing will be with your thermostat removed. If you have the voltage then the C wire is real and you can continue. If not consider having your system updated to include it.

Can you use cat5 for thermostat wire?

There are 4 pair (8 conductors) solid copper (not stranded) in Cat5e as opposed to 3,4 or 5 wire thermostat wiring you see in homes today. Yes!

Can Nest thermostat work without C wire?

According to the Nest website, your Nest thermostat will work without a C-wire but specialists still recommend using an adapter if you can’t get a C-wire installed. If your Best thermostat will not receive a constant flow of power, it might not work properly and it runs out of power it will not work at all.

Is C wire the same as RC wire?

1-2 of 2 Answers

No the Rc is the red wire. You need 5 wires or more for this to run with all the functions. You can use one of the other wires but you have to drop control of the fan. It will only come on when furnace comes on.

How many wires can be connected to the C terminal at the furnace?

Two wires per terminal in HVAC work is common (though not usually correct), while 3 or more will tend to use a pigtail.