Thermostat Wires On Furnace Control Diagram. Otherwise the arrangement will not. Strip the red and white wires back about 14 inch at both the thermostat and the furnace ends.
The thermostat you purchased is designed for a single stage system such as an air conditioner and a. C is known as the common terminal. The thermostat uses 1 wire to control each of your hvac systems primary functions such as heating cooling fan etc.
Orange this wire connects to your heat pump if you have one.
Heating only thermostat wiring diagrams if you only have a furnace such as a gas furnace oil furnace electric furnace or a boiler. Blue this is your common or c wire. Furnace control board wiring diagram tempstar wiring diagram wiring diagram furnace thermostat wiring colors talk about wiring diagram problem fan will not come on in the on position or your fan oem icp heil tempstar. The 18 refers to the gauge and the 5 refers to how many individual wires are inside the cable.