Thermostat Data Wire

The wiring diagram that you ll get from the nest app will tell you to connect the c wire to your nest thermostat.

Thermostat data wire.

Thermostat wire reference chart. Thermostat wiring compatibility unsure if honeywell home thermostats from resideo are compatible with your home. Y compressor stage 1 cooling. Knowing what each thermostat wire does can help in wiring up a new or replacement room thermostat.

R the r terminal is the power. Over a long distance the signals can become to weak to get a reading. 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 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.

Just like the y wire the w wire s control the heating aspect of your system. If your current thermostat has a wire in the c terminal. 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. A wire connected to the y3 terminal on your current thermostat indicates that you have a three stage cooling system.

The thermostat uses 1 wire to control each of your hvac system s primary functions such as heating cooling fan etc. Ecobee thermostats do not support three stages of cooling. These wires are responsible for switching the changeover valve in a heat pump system. S indoor and outdoor wired sensors.

T5 smart thermostat with c wire adapter wi fi color touchscreen thermostat sign up for the latest deals offers. The larger 18 ga. Thermostat wiring for dummies. See the diagram below for what each wire controls on your system.

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. Wire helps transmit data over a longer distance. If you see a wire connected to your current thermostat s w3 terminal we recommend booking a pro near you to install your ecobee. Use our tool to determine which thermostats work with your home s existing wiring.

This article explains just what wire at a room thermostat actually controls. Thermostat wiring and wire color chart thermostat wiring colors code. The o wire reverses the valve from heating to cooling and the b wire switches the valve from cooling to heating. Color of wire and termination.

If your current thermostat doesn t have a wire in the c terminal. Using a pocket knife trim off 1 4 of the colored coating to expose the wire. Heck now i m not calling anyone a dummy. 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.