Honeywell 4 Wire Thermostat Wiring Color Code

It s there so you can supply power to the heating and cooling switches with a single wire which is usually red.

Honeywell 4 wire thermostat wiring color code. Programmable thermostat pros and cons. Below is an industry standard thermostat wire color code complete with each wire s function. 4 wire or 5 wire thermostat wiring problem the answer. This one uses the green wire as the c wire instead of the g fan wire.

Understanding where the wires go and what they do help you. Hvac systems with more functions need more wires to communicate to and from the thermostat. Thanks for the email ed and i m glad to help. The most common is 18 5 5 strand 18 gauge.

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. Here is the industry standard thermostat wire color code used for most systems. We give a summary tables of both traditional and current thermostat wire color code keys above the 5 universal base colors for thermostat wires which are in order of frequency of use red white green yellow and black. Thermostat wiring and wire color chart thermostat wiring colors code.

You ll probably see a thermostat jumper wire connecting the rc and rh terminals. Honeywell thermostat wiring color code. Wall plate for a 4 wire smart thermostat installation. R the r terminal is the power.

Understanding thermostat wiring colors is the next step. The first thing we need to do is to identify the wires and where they go using our comprehensive guide to thermostat wire colors and codes. Each wire connects to a different terminal and is responsible for a different function. For all other t stat terminals and in fact sometimes even for the above mentioned common color assignments the exact purpose of a wire is often not clear.

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. To install your unit you ll need to connect the correct wires to the terminals on the back of your new thermostat. Honeywell thermostat wiring color code.

Color codes for 24v thermostat wires are divided into two groups. References for 4 wire thermostat wiring color code. The yellow wire connects to your. The 5 strands of wire provide enough functions for the modern.

Types of thermostat wire. The white wire connects to your heat. How to wire a thermostat.