Ask Experts Questions for FREE Help !
Ask
    JJannair's Avatar
    JJannair Posts: 2, Reputation: 1
    New Member
    		  
    #1

    Jun 30, 2011, 03:24 PM
    Wiring a new thermostat to an old central heat and air condition system
    I am trying to wire a new Hunter "Just Right" thermostat (model#42995) to my old central heat and air conditioning system. The wires coming out of the wall are Red, Blue, White, and Green. On the heat /ac system itself, they are connected as follows:
    Red is connected to R
    Blue is connected to O
    White is connected to W1/W2
    Green is connected to G
    My question is, which wire goes where on a new thermostat that is labeled G, W, Y, Rh, and Rc.
    wmproop's Avatar
    wmproop Posts: 3,749, Reputation: 91
    Ultra Member
    		  
    #2

    Jun 30, 2011, 04:10 PM
    Red to RH (with a jumper from Rh to RC ) if you have a one transformer system
    Green to G
    White to W
    Blue (which in most cases is yellow) to Y
    mygirlsdad77's Avatar
    mygirlsdad77 Posts: 5,713, Reputation: 339
    Plumbing Expert
    		  
    #3

    Jun 30, 2011, 04:49 PM

    I agree with wmproop. Wire it this way and you should be set.
    wmproop's Avatar
    wmproop Posts: 3,749, Reputation: 91
    Ultra Member
    		  
    #4

    Jun 30, 2011, 05:07 PM
    Comment on wmproop's post
    With this said I feel a need to warn you,, with a Hunter tstat feel lucky if it lasts 6 months /a year at the most, they are junk/////if you haven`t used it yet you should trade it back in for a good Honeywell
Not your question? Ask your question View similar questions
 

Question Tools Search this Question
Search this Question:

Advanced Search

Add your answer here.


Check out some similar questions!

Need wiring diagram for lennon hs23 air condition. My chalk ran in this heat [ 0 Answers ]

Chalk ran in this heat and cannot read markings to put the thing back together. The information with my air conditioner does not provide details.

Why my heat won't go off on my heating and air condition system [ 1 Answers ]

I've turned there thermastat off completely and the coils in on the system still gets hot. The only way to cool the coils is to turn the fan on or turn yhe air condition on.

Central heat and air wiring green [ 1 Answers ]

I had to replace two wires on my central heater last night because they had burned through or the wires carroaded through... both were broken at the push on connecter and the insulation was chipping off about 1 1/2 inch... the wire under neith was green and brittle..

Central Heat and Air Thermostat Issues [ 1 Answers ]

I have (electric) central heat and air throughout the house with a separate unit for upstairs. The units are 12 yrs old. Both thermostats are older (mercury readings, I think). The upstairs thermostat doesn't appear to record the proper temperature but will kick on and off according to the...

View more questions Search