What color wire goes where on a Honeywell thermostat?

The wires are typically arranged as follows: 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 a different color).

Where do the wires go on a Honeywell thermostat?





If you just have one wire, regardless if it’s labeled RC, it will go into the R terminal, and the jumper connecting terminals R and RC will be in place. Some thermostats have a jumper switch, some have a metal staple, others may have a plug, and the jumper may also just be a wire connecting the two terminals.

What is an S1 and S2 wires on a Honeywell thermostat?

S, S1, S2: These wires run directly outside and provide outdoor temperature information to the thermostat.

How do you wire a new thermostat wire?

Quote from the video:
Quote from Youtube video: Into the W terminal and the green wire into G or the fan tighten that one up as well. Okay. So we have the thermostat hooked up and then of course this wire goes into the wall and down to the furnace.

What color is the common wire 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.

Why is there a jumper between R and RC?

In most cases, the heating and cooling system share a single transformer by leaving the jumper in the lower right corner it connects the RC and RH to power heat and cool features.

How do you wire a Honeywell 4 wire thermostat?

Quote from the video:
Quote from Youtube video: That is our 24 volt hot. So that our term the red wire goes to the our terminal. So we just press and slide it in make sure that it locks. And push it all the way then we can go to our green wire.

What happens if you wire a thermostat wrong?

Potential consequences of improper installation could include: Electric shock. Blowing a circuit breaker. Damaging the thermostat unit, the electrical system or even the AC/furnace unit itself.

How many wires does a thermostat need?



The most basic thermostat has 2 wires; usually a red and a white wire. Two wire thermostat wiring is used for furnaces only and usually doesn’t need a “C” or “Common” wire. That’s why we only need two wires: Red wire for power (24h).

How do you wire a 5 wire Honeywell thermostat?

Quote from the video:
Quote from Youtube video: If if you don't have the common wire which typically is blue or brown. Okay yeah then you will have to use batteries.

What is the common wire on a thermostat?

The C-Wire, or “common wire” enables the continuous flow of 24 VAC power to the thermostat. It’s a wire that (if you have one) runs all the way from your furnace to your thermostat.

How do I install a new thermostat?



Quote from the video:
Quote from Youtube video: A wi-fi unit is just as easy to install. Feed the wires into the terminals. Until they click into place mount the thermostat control unit to the base by snapping it into.

Can I install a new thermostat myself?

Can I do it myself? An experienced DIY-er can install most programmable thermostats and some smart thermostats. Don’t forget to turn off the breaker to the HVAC equipment!

Can you change a thermostat without shutting off power?

The short answer is no, it’s not OK – you increased your risk of electrocution and that’s never a good thing specially for a DIYer.

What is C wire?

What is a C-Wire? A common wire (C-Wire) provides Wi-Fi thermostats continuous power by connecting it to a heating and cooling system (e.g. furnace). C-Wires are required on most Honeywell Wi-Fi thermostats, with the exception of the Smart Round Thermostat (formerly known as the Lyric Round).

How do I bypass the C wire on my thermostat?



Quote from the video:
Quote from Youtube video: Connect the extra wire to the C terminal of Union thermostat trace the extra unused wire from the thermostat to the furnace board make sure it's connected to the C.

How do I know if I have C wire?

It is easy to see if you already have a c-wire connected to your system. 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.”