Gas Furnace With Ac Thermostat Wiring

The most basic of systems such as an older heat only forced air gas furnace with a standing pilot light only need two wires for control.

Gas furnace with ac thermostat wiring. For example if the red wire is connected to w on the thermostat the furnace should turn on. The simplest setup for a heating system is a two wire thermostat. They connect to a two wire thermostat generally a mechanical thermostat with a mercury filled ball connected to a coiled bi metal strip. Heating only systems use two wires air conditioning adds two more wires and if you have a two stage furnace you ll need yet one more wire.

Label where the wires are connected on the thermostat check to see if they match the industry standard listed above. The hvac equipment. Most homeowners with moderate home improvement skills can wire a heat only thermostat. Thermostat wiring diagrams for heat pumps heat pump thermostat wire diagrams.

Heat pump gas furnace air conditioner air handler etc with a variety of features. Heating and cooling equipment comes in many forms ex. If the unit requires only two wires the system is only able to heat the space. Once your c wire is ready follow these steps to install your new thermostat.

When the red wire is disconnected from w the. Moreover the heat source for a basic ac system can include heat strips for electric heat or even a hot water coil inside the. Turn off your existing thermostat flip the furnace ac breaker to the off position. The kind of heating and cooling system you have will determine how many wires run from your furnace to your thermostat.

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. Heat pumps are different than air conditioners because a heat pump uses the process of refrigeration to heat and cool while an air conditioner uses the process of refrigeration to only cool the central air conditioner will usually be paired with a gas furnace an electric furnace or some other method of heating. It is actually fairly easy to install a thermostat to control a forced air furnace.