Thermostat Wiring Heat Pump Gas Furnace

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

Thermostat wiring heat pump gas furnace.

Terminal r or terminal rh for the red wire. This way you have a reference. Heating only thermostat wiring diagrams if you only have a furnace such as a gas furnace oil furnace electric furnace or a boiler. The thermostat uses 1 wire to control each of your hvac system s primary functions such as heating cooling fan etc.

The basic heat pump wiring for a heat pump thermostat is illustrated here. Before uninstalling the old thermostat take a picture of the wiring with your cell phone before removing the wires. 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. My paperback and e book.

This originates from the transformer. Y compressor stage 1 cooling y2 compressor stage 2 cooling g fan. For example if the red wire is connected to w on the thermostat the furnace should turn on. S indoor and outdoor wired sensors.

See the diagram below for what each wire controls on your system.