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.
- Green. The green wire connects to the fan.
- Orange. This wire connects to your heat pump (if applicable).
- Red (C). ...
- Red (H). ...
- Blue.
What wires go where on my thermostat?
FIVE WIRES:
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).
What do the wires mean on a 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.
