Blue T Stat Wire

In this configuration the blue wire acts as the return wire between the 24v transformer in the heating cooling system control panel and the thermostat.

Blue t stat wire.

Southwire 250 ft 18 7 thermostat wire by the roll. Thermostat wiring and wire color chart thermostat wiring colors code. The rh wire connects to the rh terminal on your thermostat. 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.

I cannot count on all fingers and toes how many times i have found those hunter brand t stats to be bad yes brand new out of the box. Blue this is your common or c wire. Cerro s thermostat wire is a class 2 power limited cerro s thermostat wire is a class 2 power limited cable for use in thermostat controls and alarm systems. Blue wires are also called c wires because they are the common wire.

If you re still a little confused and i can understand why you would be i have added a thermostat wiring made. R the r terminal is the power. 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. Featuring solid bare copper conductors and 6 miles of pvc insulation this wire is sunlight resistant and built to perform.

In standard thermostat wiring the blue wire connects to the common terminal on the thermostat making it the c wire. This wire may be red without an h attached to it depending on if you have a dual transformer setup. The red wire is hot. Blue c is the common wire if your t stat is battery powered then it is unused.

30 received 0 votes on 0 posts quote. Thermostat wire reference chart. So in this case the g wire actually does control the hvac fan. The next t stat the honeywell t87n1026 big dial model does not require a c wire.

The blue or c wire. The rh wire connects to your heating system as opposed to your cooling system. It does not have the g wire. 6 10 11 09 05 55 am m.

You may also have up to two black wires as well but these are used for various heating systems in the north or for outdoor purposes so for most of you these won t need any attention. If hooking it up like that does not work disconnect the t stat touch red to green and white if you have heat the t stat is bad. If the blue wire is not hooked up then strip it back and wire to c on the board and take the blue wire at the t stat and wire that to c. Again no blue wire appears.

Item 539960 model 64170444. Knowing what each thermostat wire does can help in wiring up a new or replacement room thermostat.