What if there is no C terminal on thermostat?

If your current thermostat didn’t need a C-wire, it (or a wire that can be used as a C-wire) might be rolled up inside the wall. This is more likely to be true if you see all the other color wires present. Line voltage thermsotat scenario: you have just two wires (white and red, probably), and they’re thick.

What do I do if I dont have C wire?





Quote from the video:
Quote from Youtube video: Terminal. If there's already a wire attached to the C terminal. Just leave it be and attach a new wire next to it go ahead and push all the wires back into the wall. And close the backplate.

Where do you connect the C wire?

On the C-Wire Adapter’s “Equipment” side, connect the wires to the corresponding terminals on the control board. Note: Be sure to remove the plastic tip on each wire before connecting to a terminal. Use the included mount and adhesive pad to attach the C-Wire Adapter inside your furnace or heating system.

How do I install nest power connector without C terminal?

Quote from the video:
Quote from Youtube video: So first i took the r cable on the power connector. Put it into a wire connector. And then i'm taking the r from the circuit board. And putting it in the wire.

How do I install a smart thermostat without C wire?

Quote from the video:
Quote from Youtube video: We only have four wires that are used you have the are wire the W wire the G wire and the wire most Wi-Fi thermostats.

Can I use G wire for C wire?





Option #3: Use a G-Wire as a C-Wire



If there is no hidden C-wire, you can use a G-wire instead. However, you will not be able to use your fan independently when the heating or cooling isn’t running. Also, many HVAC systems are incompatible with this solution, including: HVAC systems using electric heat.

Can Google nest 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.

Where do you connect the C wire on an old furnace?

Quote from the video:
Quote from Youtube video: The common terminal is going to be right here so if you're installing. Something you would stick the wire. Into this screw terminal from the bottom.

Where does C wire go on thermostat?

Quote from the video:
Quote from Youtube video: See which wires go to the screw terminals seeing that r is going to the red wire. And then white wire is connected to the w terminal.

Can I install ecobee without C wire?



If you’re lacking a C wire and have at least four wires at your thermostat to work with (refer to this article if you only have two wires), you’ll want to install the Power Extender Kit (PEK).

What color is the C wire?

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 Nest Power Connector connect?



Where to install the Nest Power Connector

  1. If your home has one thermostat, install the power connector at the furnace or air handler. …
  2. If you have a zoned system with more than one thermostat, install the power connector at the zone controller.


Is RC wire same as C wire?

The C and Rc wires are not the same. To install this thermostat you should follow the exact same wiring of the previous thermostat.

Can I connect C wire to R?

If the black wire on the R terminal goes to the thermostat and only the thermostat, you can safely move it over to the C terminal. The AC and humidistat being hooked up to C is correct. R and C together carry the 24v power that a smart thermostat (and some programmable models) use for power.

Where does C wire go on air handler?



Quote from the video:
Quote from Youtube video: You would typically connect. This a/c wire to be the C terminal on the board on the control board on in the furnace.

Does Nest Thermostat E work without C wire?

It may also test to check if the C wire delivers enough power to your Nest thermostat. With a Nest Thermostat E or Nest Learning Thermostat, you’ll need to install a C wire if the thermostat has power issues or its battery often drains.

How do you use a C wire adapter?

Quote from the video:
Quote from Youtube video: And they will send you one all right so now we're going to take our thermostat wire here and connect this to our c wire adapter.