Old Thermostat Wiring Color Code

The 5 strands of wire provide enough functions for the modern.

Old thermostat wiring color code. Heat pump thermostat wire color code duration. This article explains just what wire at a room thermostat actually controls. 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. Lately the company that makes thermostat wire changed the colours around so older homes have the colours above but if you bought a spool of thermostat wire lately its going to be red white orange green blue are the new colours.

The usual terminals are. Each wire connects to a different terminal and is responsible for a different function. I discuss how to wire the contactor and what the difference is between the. There are a variety of thermostat wire types.

How to wire a thermostat. For the thermostat wiring colors code for this terminal if equipped consult with the installer or trace the wire out to. Well explained tutorial on wire color codes. This data can also be helpful if thermostat wires have become mixed up or improperly color coded by allowing you to trace wires back to their control connection point.

I explain what each of the letter terminals are for the voltage path how it works and also the normal color code used. Types of thermostat wire. Knowing what each thermostat wire does can help in wiring up a new or replacement room thermostat. To install a new thermostat or repair an existing device you ll need to understand the different colors of wires.

Color of wire and termination. Thermostat wire reference chart. This is often referred to as a 1h 1c conventional thermostat terminal designations. G fan usually a green wire r 24 vac usually a red wire rc and rh are discussed later c 24 vac common y compressor usually a yellow wire w heat usually a white wire.

R the r terminal is the power. Heat pumps use staging for auxiliary heat and need a w2 terminal the most common color ive seen used for this terminal and wire designation is brown but this varies and is completely up to the installer what color to use. Thermostat wiring and wire color chart thermostat wiring colors code. Hvac systems with more functions need more wires to communicate to and from the thermostat.

The main difference setting each apart is the number of colored wires. Skip navigation sign in. The most common is 18 5 5 strand 18 gauge. The thermostat wiring color code guide from wi fi thermostat reviews.