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. It terminates at the air handler or furnace. The common wire sometimes referred to as the c wire is what s responsible for delivering constant power to your thermostat.

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Typically the yellow wire will be run to the air handler where at the air handler this wire is usually connected to another wire typically by a wire nut.

Ac thermostat control wiring.

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. Origin is the control transformer and then the r terminal. The yellow wires connect to the y terminals on your thermostat. G terminal is connected to the green wire or g wire this is for the blower fan in the air handler.

The yellow wires terminate at your compressor contactor via an 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. 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. The green wire underneath your thermostat connects to the fan of your furnace or air handler.

They control your air conditioning system.

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