colors

Wiring colors for thermostat refer to the standardized color-coding system used to identify and connect the electrical wires of a thermostat to the appropriate terminals on the heating, ventilation, and air conditioning (HVAC) system.

Each wire color is assigned a specific purpose, such as:

Thermostat wiring colors are a crucial aspect of HVAC systems, providing a standardized method for connecting thermostats to heating and cooling equipment. Each color represents a specific function, ensuring proper communication and control of the system. For instance, red wires typically indicate power supply, while green wires represent the fan circuit, and yellow wires control the compressor.

Every wire and terminal on an air conditioner or heat pump outdoor unit or indoor air handler has a specific function, so connecting wires correctly is essential. To help with this process, manufacturers use a color-coded system to identify each wire’s purpose.