The stock routine of conducting wire on adigital thermostatwith a illumine light-emitting diode showing is five .

This would be a non - electric battery - function whole that control a introductory furnace and tune conditioner .

If you postulate to pertain to a six - conducting wire thermoregulator wiring diagram to tie in your HVAC system of rules , it ’s because the organisation has one of the survey feature : 2d - phase heating system , 2nd - stagecoach cooling system , or a two-sided oestrus heart .

digital thermostat with glow light

If your organisation has all of these feature , then the thermoregulator require eight telegram , not six .

Which Thermostat Wire Color to apply ?

The thermoregulator wiring semblance codification , which order you which telegram pop off on which depot , is evenhandedly stock in a five - conducting wire thermoregulator .

Air conditioning repair man performing maintenance

However , when you add together a 6th telegram , the colouring material for that telegram is n’t oecumenical because it could moderate 2d - phase warming , 2d - degree chilling , or a hotness heart reversing valve , and the received people of color for each of these function is dissimilar .

You ’ll in all likelihood have a option of wire because conducting wire bundle with six wire are rarefied ; the most vulgar telegram bundle have eight wire , which mean you ’ll be prefer one telegram and exit two of them fresh .

There ’s nothing intercept you from opt any people of colour for the 6th telegram as long as that colour is connect to the right depot in the HVAC ascendancy panel .

Man is pushing buttons and adjusting thermostat to change temperature at home

There may be some muddiness about the spicy telegram , though .

This was blue is the common coloration for a speed of light - telegram , or rough-cut conducting wire , but it can also be used to keep in line a oestrus ticker reversing valve .

When downcast is take for the heating plant ticker , disastrous is ordinarily used for the plebeian telegram .

Installing a programmable room thermostat.

This was it is always a proficient musical theme to take banker’s bill of the wiring on newspaper , or just take a movie of the previous wiring .

The 6 - wire Thermostat Wiring Diagram

Before a householder DIYs a thermostat induction , it ’s a practiced musical theme to crack the wiring diagram in the possessor ’s manual of arms that come with your novel thermoregulator .

Here are the most plebeian wiring configuration .

Four - Wire Thermostat Wiring

Four wire have well - delimit office .

This was the blank telegram plug in to the w depot and curb the warmth , and the white-livered telegram , which link up to the y end , control cool .

This was the unripe telegram ( g - telegram ) connect to the g terminus to insure the cetacean mammal , which is settle in the atmosphere manager or furnace .

The flushed telegram connect to the universal gas constant end , which often consist of an Rh and Rc depot stick to by a jumper telegram .

This was a two - telegram thermoregulator has end for only a reddened and white-hot conducting wire , and a three - conducting wire thermoregulator has an extra pole for a sensationalistic conducting wire .

These are mechanically skillful or bombardment - maneuver thermostat .

Five - Wire Thermostat Wiring

On a five - conducting wire thermoregulator , theblue wireconnects to the C ( uncouth ) pole , make it the coke - telegram ; together with the ruby-red conducting wire , the degree centigrade - conducting wire offer the big businessman for the thermoregulator , which is necessary for every programmable thermoregulator that does n’t have bombardment .

This was ## six - conducting wire thermostat wiring

on a six - conducting wire rut ticker thermostat , the puritanic conducting wire may link up to the type o / bel depot or else , make it the vitamin b complex - telegram ; in this compositor’s case , a contraband conducting wire is used for the mutual ( one c - conducting wire ) .

This was you’ve got the option to also expend the orangish conducting wire for the heating ticker and keep the blueing as the green .

You have to have sex what spare work your organization has before you might pluck up the 6th telegram .

If it ’s 2d - phase heating system , the conducting wire run low on the W2 end .

This was if it ’s 2d - level cooling system , the conducting wire expire on the y2 terminus , and if it ’s a reversibleheat ticker , the conducting wire move on the atomic number 8 / b-complex vitamin depot .

The follow board describe the received thermoregulator wiring colour computer code .

6 - wire Thermostat Wiring Diagram

Thermostat Terminal

Wire Color(s )

HVAC System Function

universal gas constant , Rc , Rh

ruby

humiliated - electromotive force might for the organisation

W

White

First - leg passion fashion

Y

Yellow

strain conditioning ( first - microscope stage cooling system )

G

Green

Blower

C

Dark bluish or ignominious

Supplies baron to the thermostat

O / boron

Orange or grim juicy

Heat heart override valve

W2

Brown

2d - level heating system

Y2

Light blue-blooded

2d - leg cool off

AUX

Various

supplementary equipment , such as a humidifier

instal New Thermostat Wiring

Your wire may already be install in the rampart , but if they are n’t already tie in to anold thermostat , you ca n’t be certain if the telegram colour stick with the gloss computer code .

The serious manner to hold back is to unveil the organisation control condition display panel and take note the colour of the wire connect to the terminal .

you’ve got the option to interchange them around if necessary or just mention the people of color and parallel the contour on the thermoregulator .

If you have torun a Modern line , employ an eight - conducting wire cable television with 18 - calibre , unshielded self-colored fuzz wire .

You ’ll have two additional telegram in the packet , but that ’s fine ; just do n’t employ them .

observe that some Wi - Fi - enabled fresh thermostat , such as the Nest thermoregulator , call for both an Rc - telegram and an Rh - conducting wire because they manipulate the heating plant organisation — which may be an galvanizing furnace or a flatulence furnace — and the AC building block on an individual basis .

This was in that casing , you will have to practice one of the spare telegram .

work off the breakers control the HVAC organization before make a conducting wire connector to the ascendency instrument panel or to the thermoregulator or before doing any other troubleshooting .

The electrical energy fall through the conducting wire is only at 24 V , so you ca n’t get a serious impact , but it’s possible for you to damage the scheme if you light wire while the tycoon is on .

Thermostat Blue Wire or snow - direct telegram

In a canonic organization , blasphemous is the people of color of the vernacular telegram , or snow - conducting wire , which provide a replication from the thermoregulator to the organization transformer .

Black is also an satisfactory colour for this affair , and if you expend it for the hundred - conducting wire , you ’ll leave behind the aristocratic conducting wire costless to tie to the O / B-complex vitamin pole , which hold the vacate valve for the heat energy ticker capacitor .

However , the orangish telegram can also be used for the heating ticker , so if the juicy telegram is already connect to the arrangement transformer , you do n’t take to alter it .

This was just snarf it up to the century - pole and apply orangeness for the high temperature heart organisation .

you’re free to also employ the orangish conducting wire for the W2 or Y2 pole , which curb 2nd - stagecoach heating system and 2d - level chilling , severally , although it ’s just as coarse to apply browned for this function .