Ac Thermostat Control Wiring

Air conditioner thermostat wiring details and color code r terminal is connected to the red wire or r wire this is 24 volt power for the thermostat and controlled devices.

Ac thermostat control wiring.

G terminal is connected to the green wire or g wire this is for the blower fan in the air handler. For programmable thermostats and smart thermostats c wires are essential for setting a schedule or having your heat or air conditioner turn on at a desired temperature. If your home s system of this vintage has provisions for air conditioning cooling then the thermostat wiring will have at least three wires some will require a separate r terminal for heating and cooling and will be labeled rh and rc now needing a minimum of 4 wires r w and a y terminal. The common wire sometimes referred to as the c wire is what s responsible for delivering constant power to your thermostat.

They control your air conditioning system. The yellow wires connect to the y terminals on your thermostat. It terminates at the air handler or furnace. Furthermore it will be one of the few control wires thermostat wires that will terminate at the condenser in a split system air conditioner and heating system.

Origin is the control transformer and then the r terminal.