Best Explained Hvac Thermostat Wire Color Code Youtube 8 wire thermostat wiring color codes. an 8 wire thermostat is the most complex home thermostat setup. it is used when you have both a 2 stage heat pump and a 2 stage furnace (usually for a heat pump with a furnace backup setup for colder days). here are the typical 8 wire thermostat wire color codes: blue wire (sometimes black wire). this is. G – green: this wire controls the blower motor in the furnace. y2 – light blue: this wire is necessary if you have a two stage ac compressor. if the ac is single stage, this terminal will be empty. w2 – light brown: this wire functions like the light blue wire but for furnaces with low and high stages of heating.
Hvac Thermostat Wiring Colors 8 wire thermostat wiring. here is the most common use of 8 wires. what uses 8 wire thermostat wiring? these are almost always heat pump hvac systems aux heat. how to wire an 8 wire thermostat: 1). attach the red wire to the r terminal for 24v power. 2). attach the white wire to the w (or w1) terminal for the heat pump’s heating mode. 3). 6 wire thermostat wiring color code. you’ll have a 6 wire thermostat if your system has two stages of heat and one stage of air conditioning. two stage heating systems have a low setting and a high setting. apart from the red, green, white, yellow, and black or blue common wire, a 6 wire thermostat will also have a brown wire that connects to. Yellow wires. the yellow wires on your thermostat connect to your compressor. they control your air conditioning system by turning the compressor on and off. the yellow wires connect your thermostat to your compressor contactor via the air handler. the yellow wires connect to the y terminals on your thermostat. Orange wire (o): reversing valve control. the orange wire (o) is essential for heat pump systems. when your thermostat calls for cooling, the orange wire activates the reversing valve, allowing your heat pump to switch into cooling mode. in heating mode, this wire reverses the refrigerant flow, enabling your heat pump to provide warmth.
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