Thermostat Data Wire

These wires are responsible for switching the changeover valve in a heat pump system.

Thermostat data wire.

The main trouble is dealing with those different colored wires knowing which one does what and if that wasn t enough you also have numbers and letters to deal with. R the r terminal is the power. If you see a wire connected to your current thermostat s w3 terminal we recommend booking a pro near you to install your ecobee. If your current thermostat has a wire in the c terminal.

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 nest app won t tell you to connect one do not connect a c wire to your nest thermostat unless the nest app tells you to. Using a pocket knife trim off 1 4 of the colored coating to expose the wire. The common wire sometimes referred to as the c wire is what s responsible for delivering constant power to your thermostat.

The thermostat uses 1 wire to control each of your hvac system s primary functions such as heating cooling fan etc. See the diagram below for what each wire controls on your system. Over a long distance the signals can become to weak to get a reading. The wiring diagram that you ll get from the nest app will tell you to connect the c wire to your nest thermostat.

The o wire reverses the valve from heating to cooling and the b wire switches the valve from cooling to heating. Thermostat wiring for dummies. If your current thermostat doesn t have a wire in the c terminal. Thermostat wiring compatibility unsure if honeywell home thermostats from resideo are compatible with your home.

S indoor and outdoor wired sensors. A wire connected to the y3 terminal on your current thermostat indicates that you have a three stage cooling system. Color of wire and termination. Just like the y wire the w wire s control the heating aspect of your system.

A thermostat wire uses low voltage signals to transfer data. Use our tool to determine which thermostats work with your home s existing wiring. Ecobee thermostats do not support three stages of cooling. Even the most seasoned people who enjoy diy may come across problems with wiring a thermostat.

For programmable thermostats and smart thermostats c wires are essential for setting a schedule or having your heat or air conditioner turn on at a desired temperature while some units can run without a c wire even brands like nest recommend having one for optimal. Heck now i m not calling anyone a dummy. This article explains just what wire at a room thermostat actually controls. The larger 18 ga.

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. Y compressor stage 1 cooling. T5 smart thermostat with c wire adapter wi fi color touchscreen thermostat sign up for the latest deals offers. Thermostat wiring and wire color chart thermostat wiring colors code.