Hvac Thermostat Wiring Diagram

Therefore you will use the following color code for simple thermostat wiring.

Hvac thermostat wiring diagram. Furnace thermostat wiring diagram terminal letters on a thermostat and what they control the hot wire 24 volts usually red from the transformer is the main power wire to turn on or off a furnace components. For example if the red wire is connected to w on the thermostat the furnace should turn on. C is known as the common terminal. R the r terminal is the power.

Yellow the yellow wire connects to your compressor. The thermostat is the control device that provides a simple user interface with the internal workings of your homes climate control system. See the diagram below for what each wire controls on your system. Orange this wire connects to your heat pump if you have one.

The common wire sometimes referred to as the c wire is what s responsible for delivering constant power to your thermostat. The thermostat uses 1 wire to control each of your hvac system s primary functions such as heating cooling fan etc. This originates from the transformer. The diagram below shows how a basic 4 wire thermostat is connected as indicated by the color code chart above.

Red now there can be two separate wires for this. S indoor and outdoor wired sensors. White the white wire is what connects to the auxiliary heat on your system. When the red wire is disconnected from w the furnace should turn off.

Heat pump thermostat wiring a typical wire color and terminal diagram. The color of wire r is usually red and c is black. Color of wire and termination. And consult your hvac and thermostat manuals for wiring diagram information if you re not quite sure which wire goes where or what configurations your hvac system supports.

Terminal r or terminal rh for the red wire. Y compressor stage 1 cooling y2 compressor stage 2 cooling g fan. Thermostat wiring diagrams furnaces. These two connections will ensure that there is power to the thermostat that you are operating.

The basic heat a c system thermostat typically utilizes only 5 terminals. Thermostat wiring and wire color chart thermostat wiring colors code. Rc red wire power 24 vac rh or 4 red wire jumpered power 24 vac. Heating only thermostat wiring diagrams if you only have a furnace such as a gas furnace oil furnace electric furnace or a boiler.

Mako driver kit 64 precision bits ifixit s 4 mm aluminum screwdriver handle and a flex extension. As shown in the diagram you will need to power up the thermostat and the 24v ac power is connected to the r and c terminals. Green the green wire connects to the fan.