The green wire underneath your thermostat connects to the fan of your furnace or air handler. It terminates at the air handler or furnace. The green wire connects to terminal G on your thermostat.

What do the wires mean on thermostat?

Rh stands for Red-Heat and Rc stands for Red-Cool. If you only have a single red wire the jumper between Rh and Rc are required for some heating and cooling hybrid systems depending on your thermostat. Yellow/Y is the AC compressor. White/W is the Heating element. Green/G runs the fan.

Where do thermostat wires go on furnace?

If your system has a C-wire, it might be in use or just tucked away behind your current thermostat. If your system doesnt have a C-wire, youll need to run a new cable from your furnace to your thermostat to install most of the modern smart thermostat models.

What are the red and white wires on a thermostat?

This is the most common type of thermostat wiring, and it covers systems that control both heat and air-conditioning. The usual arrangement of the wires is: red for 24-volt hot, white for heat, yellow for cooling, green for the fan, and blue for common (although the common wire may be another color).

How do I connect 4 wires to my Honeywell thermostat?

4:027:00How to Upgrade to a Smart Thermostat with Four WiresYouTube

How do you wire a thermostat to a furnace?

0:365:39Thermostat Wiring to a Furnace and AC Unit! Color Code, How it Works YouTube

Where does the e wire go on a Honeywell thermostat?

The E terminal has a back-up heat source. If you have a heat pump package unit, the E terminal should be wired directly to the heating relay or the stripboard of the air handler.

Where do you connect the common wire on a furnace?

3:176:13How to Connect an Unused C Wire (Common Wire) - YouTubeYouTube

What does white wire mean on thermostat?

heat Here is the industry standard thermostat wire color code used for most systems: White. The white wire connects to your heat. Yellow. The yellow wire connects to your compressor.