Thermostat Wiring Heat Pump Gas Furnace

Terminal r or terminal rh for the red wire.

Thermostat wiring heat pump gas furnace.

Both the furnace control board and the thermostat will usually have the same terminal letters. This way you have a reference. My paperback and e book. See the diagram below for what each wire controls on your system.

For example if the red wire is connected to w on the thermostat the furnace should turn on. It corresponds to the chart below to explain the thermostat terminal functions. When the red wire is disconnected from w the furnace should turn off. 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.

Heating only thermostat wiring diagrams if you only have a furnace such as a gas furnace oil furnace electric furnace or a boiler. Therefore you will use the following color code for simple thermostat wiring. 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.

Before uninstalling the old thermostat take a picture of the wiring with your cell phone before removing the wires.