Heating Thermostat Wiring Colors

Color of wire and termination.

Heating thermostat wiring colors.

State of the art hvac systems these days in addition to the original single stage heating provision often include a second stage heater as well as one or two stages of cooling central ac. Plus i m anything but a technician so what i have detailed below is here purely as a guideline. R the r terminal is the power. Trade model thermostats are required to operate dual fuel systems systems that use a heat pump for the first 1 or 2 stages of heating and use a gas or oil furnace for backup emergency heating.

To install your unit you ll need to connect the correct wires to the terminals on the back of your new thermostat. There are a variety of thermostat wire types. Types of thermostat wire. The main difference setting each apart is the number of colored wires.

The white wire connects to your heat. So here we show examples of honeywell thermostat wiring color code for these higher wire count t stats. My paperback and e book. Thermostat wiring tips color codes thermostat wire installation tips and wier color decoder tips on thermostat wiring color code conventions old timer tips on shorting out thermostat wires on purpose to identify which wire is which shorting out thermostat wires leads to loss of heat this article describes several tricks of the trade used by professionals when installing room.

The white wire underneath your thermostat connects to your heating system. Below is an industry standard thermostat wire color code complete with each wire s function. 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. The most common is 18 5 5 strand 18 gauge.

It terminates at your air handler or furnace. The yellow wire connects to your. The 5 strands of wire provide enough functions for the modern. Hvac systems with more functions need more wires to communicate to and from the thermostat.

What i would like you to know is the information detailed below is based on the industry standard yet not all thermostats will work this way simply because letters and numbers are used as well as color. Here is the industry standard thermostat wire color code used for most systems. Understanding thermostat wiring colors is the next step.