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In this video we teach you the meaning of each thermostat color and how they are used in your home. These thermostat color codes are the standard colors for HVAC systems. The Red wire (Rc or Rh) provides power to the thermostat. The Yellow wire (Y) is for cooling. The White (W) is for heat. The Green wire (G) is for fan control. The Blue wire (C) is typically for common wires.

This thermostat wiring color code convention is what 90% of HVAC systems use. If you have a heat pump this video will be a better explanation:    • Nest Heat Pump Wiring Diagram:  How T...  

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