Thermostat Wiring Heat Pump Gas Furnace

Y compressor stage 1 cooling y2 compressor stage 2 cooling g fan.

Thermostat wiring heat pump gas furnace.

Terminal r or terminal rh for the red wire. This way you have a reference. See the diagram below for what each wire controls on your system. 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.

Both the furnace control board and the thermostat will usually have the same terminal letters. The basic heat pump wiring for a heat pump thermostat is illustrated here. Therefore you will use the following color code for simple thermostat wiring. S indoor and outdoor wired sensors.

Before uninstalling the old thermostat take a picture of the wiring with your cell phone before removing the wires. My paperback and e book. This originates from the transformer. The thermostat uses 1 wire to control each of your hvac system s primary functions such as heating cooling fan etc.

When the red wire is disconnected from w the furnace should turn off.