Hvac Thermostat Wiring Colors

Types of thermostat wire.

Hvac thermostat wiring colors. These two connections will ensure that there is power to the thermostat that you are operating. There are a variety of thermostat wire types. Furthermore the power for both the condenser and the air handlerfurnace. It is better to take a good up close photo of the old thermostat and what terminals the colored wiring are terminated.

Ac service tech llc. Basic electrical 101 08 hvac thermostat wiring and troubleshooting. 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 red wire is hot.

In standard thermostat wiring the blue wire connects to the common terminal on the thermostat making it the c wire. The hvac wiring is coded based on the action it performs while where the. The 5 strands of wire provide enough functions for the modern. While there isnt an official standard for thermostat circuit wiring colors there is a general pattern.

The wiring of your thermostat appears complicated but when you understand the basic structure of it including the terminals and thermostat wiring colors its much less overwhelming of a task to install your own system. In this configuration the blue wire acts as the return wire between the 24v transformer in the heatingcooling system control panel and 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. The main difference setting each apart is the number of colored wires.

Substitute g wire for c wire install the honeywell wi fi smart thermostat with this video duration. Thermostat signals and color code. 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. Hvac systems with more functions need more wires to communicate to and from the thermostat.

Thermostat wiring to a furnace and ac unit. Back in the olden days thermostats were simple onoff devices that didnt need their own continuous power supply. The most common is 185 5 strand 18 gauge. Your best bet is to see the manufacturers documentation both thermostat and hvac.

Linh pacchiana 42422 views. Modern thermostats with wi fi and backlit display by contrast need a steady supply of juicethe c wire or common wire enables the continuous flow of 24 vac power to the thermo. C is known as the common terminal. Heat pump thermostat wiring a typical wire color and terminal diagram.