Heat pump gas furnace air conditioner air handler etc with a variety of features.
Gas furnace with ac thermostat wiring.
Thermostat wiring diagrams for heat pumps heat pump thermostat wire diagrams.
When the red wire is disconnected from w the.
If the unit requires only two wires the system is only able to heat the space.
The hvac equipment.
Most homeowners with moderate home improvement skills can wire a heat only 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.
It often comes down to what type of system was installed and the wiring or lack of wiring between that equipment and the thermostat.
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.
Once your c wire is ready follow these steps to install your new thermostat.
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.
It is actually fairly easy to install a thermostat to control a forced air furnace.
Heating and cooling equipment comes in many forms ex.
If any cooling like an air conditioner or fan control is required more wires are needed.
How to wire an air conditioner for control 5 wires the diagram below includes the typical control wiring for a conventional central air conditioning system furthermore it includes a thermostat a condenser and an air handler with a heat source.
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.
Moreover the heat source for a basic ac system can include heat strips for electric heat or even a hot water coil inside the.
The simplest setup for a heating system is a two wire thermostat.
Turn off your existing thermostat flip the furnace ac breaker to the off position.
Label where the wires are connected on the thermostat check to see if they match the industry standard listed above.