Wiring Diagram

Furnace Thermostat Wiring Diagram

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. Always refer to your thermostat or equipment installation guides to verify proper wiring.


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Note y2 some ac systems will have a blue wire with a pink stripe in place of the yellow or y wire.

Furnace thermostat wiring diagram. Green wire for the fan. How to wire a thermostat. Next let s talk about the c or common wire.

The thermostat wiring on these systems can have very similar wiring properties. Blue wire is the common wire common wire can be of any other color. Thermostat wiring diagrams for heat pumps heat pump thermostat wire diagrams.

The thermostat is the control device that provides a simple user interface with the internal workings of your homes climate control system. White wire for heat. If you have a trane model thermostat and have a wire labeled x or b refer to your thermostat manual.

It is a red wire and comes from the transformer usually located in the air handler for split systems but you may find the transformer in the condensing unit. Thermostat wiring and wire color chart thermostat wiring colors code. This type of wiring is usually found in air conditioning systems or gas furnaces.

Refer to the blower chart for cfm requirements. In some cases one of those wires may be your common. Red wire for 24 volt hot.

Let s take a look at the g wire. Variety of goodman furnace thermostat wiring diagram. 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.

R the r terminal is the power. By the use of an adjustable set point the job of the thermostat is to turn on either the heating or cooling system to maintain the desired room temperature in the home and to turn off the system when the desired temperature is achieved. For example if the red wire is connected to w on the thermostat the furnace should turn on.

It has 5 different color wires each for a different terminal and function. Yellow wire for cooling. A large majority of homes today have an hvac system containing a furnace oil gas or electric and an a c unit.

A wiring diagram is a simplified standard pictorial representation of an electrical circuit. It reveals the parts of the circuit as simplified shapes and also the power as well as signal links between the tools. Color of wire and termination.

If you have a c wire place it into the c terminal on your wall plate. To wire a thermostat you must first be aware of the type of system that you have in your home. This diagram is to be used as reference for the low voltage control wiring of your heating and ac system.


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