Thermostat Wiring Heat Pump Gas Furnace

Terminal r or terminal rh for the red wire.

Thermostat wiring heat pump gas furnace. Y compressor stage 1 cooling y2 compressor stage 2 cooling g fan. The basic heat pump wiring for a heat pump thermostat is illustrated here. This way you have a reference. See the diagram below for what each wire controls on your system.

Both the furnace control board and the thermostat will usually have the same terminal letters. My paperback and e book. S indoor and outdoor wired sensors. The thermostat uses 1 wire to control each of your hvac system s primary functions such as heating cooling fan etc.

Heating only thermostat wiring diagrams if you only have a furnace such as a gas furnace oil furnace electric furnace or a boiler. 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. This originates from the transformer. When the red wire is disconnected from w the furnace should turn off.

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