Hvac Wiring Colors

The wiring of your thermostat appears complicated but when you understand the basic structure of it including the terminals and thermostat wiring colors it s much less overwhelming of a task to install your own system.

Hvac wiring colors. Basic thermostat wiring colors air conditioner systems always remember when changing a thermostat for a new thermostat to take a photo of the colors and where they go on the old thermostat or get a pencil and paper and write it down. The hvac wiring is coded based on the action it performs while where the. These two connections will ensure that there is power to the thermostat that you are operating. Thermostat wiring to a furnace and ac unit.

Wiring a basic heat pump system duration. If you only have 4 wires they are typically red yellow green black. The 5 strands of wire provide enough functions for the modern thermostat. Modern thermostats with wi fi and backlit display by contrast need a steady supply of juice the c wire or common wire enables the continuous flow of 24 vac power to the thermo.

Thermostat wiring colors code high performance hvac thermostat terminal designations before proceeding we highly advise that you turn the power off at the circuit breaker. The color of wire r is usually red and c is black. Hvac systems with more functions need more wires to communicate to and from the thermostat. As shown in the diagram you will need to power up the thermostat and the 24v ac power is connected to the r and c terminals.

Heat pump thermostat wiring explained. Understanding the information those colors convey helps you work with greater safety and ease when troubleshooting an electrical problem or making repairs or improvements to your electrical system. There are a variety of thermostat wire types. Colors terminals functions.

Furthermore the power for both the condenser and the air handler furnace. Heat pump thermostat wiring a typical wire color and terminal diagram. The most common is 18 5 5 strand 18 gauge. The main difference setting each apart is the number of colored wires.

C is known as the common terminal. Hope this helps a few folks out. Your best bet is to see the manufacturer s documentation both thermostat and hvac. While there isn t an official standard for thermostat circuit wiring colors there is a general pattern.

Thermostat schematic wire colors. Video demonstrating the standard wiring for the primary blower motor found in most furnaces and air handlers in residential hvac.