What color wire goes where on a thermostat?

What color wire goes where on a thermostat?

This is the most typical thermostat wiring style, and it applies to systems that regulate both heat and air conditioning. 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).

What are the S1 and S2 terminals for on a thermostat?

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

What are the correct color identification of standard thermostat wires?

Here is the industry standard color code for thermostat wires used for most systems:

  • The W wire is connected to your heating system.
  • The Y wire is yellow and connects to your air conditioning compressor.
  • The G wire is green and connects to the fan.
  • Rc and Rh: The red wire(s) are the power source for your thermostat.

Where do my thermostat wires go?

The white wire underneath your thermostat connects to your heating system. It terminates at your air handler or furnace. The white wire connects to terminal W in industry-standard thermostats.

What does white wire do on thermostat?

In general, manufacturers have dedicated white wires to heating systems. You will only see white wires if your thermostat controls your heating system. You may also have more than one white wire if your system is equipped with more than one stage of heating.

Do I need a jumper from R to RC?

If you have a wire in the R terminal, and another wire (not a jumper) in the RC terminal, you will not need to connect the R and RC terminals. See our Basic Wiring article for more info here.

What is the difference between R and RC on a thermostat?

In a thermostat, the R wire is responsible for powering the entire HVAC system (through a transformer). If you have both an Rh (Red-heat for powering the heating) and an Rc (Red-cool for powering the cooling), then the R wire can be connected to either Rh or Rc.

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 you wire a 4 wire thermostat?

Reconnect the 4 wires to the appropriate terminals – red to R, white to W or W1, green to G, and blue or yellow to Y – and screw them in place. Pull each wire to make sure that it’s fixed in place. Turn on the heat pump or any other HVAC device that connects to the 4 wire thermostat.

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