Ask Experts Questions for FREE Help !
Ask
    kiritcdesai's Avatar
    kiritcdesai Posts: 3, Reputation: 1
    New Member
    		  
    #1

    Apr 29, 2010, 10:18 AM
    Heating furnace works when "on" but doen't start on auto
    I just changed the thermostat on my furnace. When I switch to auto - cool, the A/C is working fine. But, when I switch to auto - heat, the heater doesn't come on.

    I also tried to see if the furnace is coming on when the blower is on. When the switch is "On" the heater and A/C are working fine based upon the thermostat temperature set up. Looks like the connecting wires need to be changed. Hate to experiment without any clue.
    Joshdta's Avatar
    Joshdta Posts: 2,549, Reputation: 45
    Ultra Member
    		  
    #2

    Apr 29, 2010, 10:26 AM

    Did you put a jumper from rh to rc??
    kiritcdesai's Avatar
    kiritcdesai Posts: 3, Reputation: 1
    New Member
    		  
    #3

    Apr 29, 2010, 12:11 PM
    Quote Originally Posted by Joshdta View Post
    did you put a jumper from rh to rc???
    I have connected the 4 wires according to color coding.
    Joshdta's Avatar
    Joshdta Posts: 2,549, Reputation: 45
    Ultra Member
    		  
    #4

    Apr 29, 2010, 12:22 PM

    Does the new stat have a rh and a rc?
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!

Intertherm Electric Furnace Blower works in "on" not in "auto" [ 6 Answers ]

I have an Intertherm Electric Furnace E2EB-015AH. I came home from work last night, turned the heat on and it didn't work as advertised. I could hear the relays clicking occasionally so I investigated a little and found the elements are heating up and cycling, the relay inside the thermostat cycles...

Lennox furnace blower doesn't come on when on "auto" [ 5 Answers ]

I have a Lennox furnace model G23Q3/4-100-2. When the thermostat calls for heat, the igniter will light the pilot, the gas will come on and light, but the blower does not come on and the furnace will shut off after a few minutes (overheats because of no blower). I can turn the thermostat to on...

Central heater will not work on "auto" and blows cool air when on "man" [ 2 Answers ]

OK my central heater blower will not come on at all when on auto, and when on manual/on it just blows cool air out of vents. I was told to put a jumper wire on (w) to (g)wires at the thermostat, (I think) to check it, but not sure exactly. Is that the thermostat on wall or what? The pilot light is...

Furnace fan won't run on "auto" [ 1 Answers ]

I have an 18 yr old lennox gas furnace that has worked fine until this winter. If I set the thermostat to heat, the fan to auto, and set the dail up over the room temp, the gas burner lights for about 2-3 minutes... then turns off. If I flip the fan from "auto" to "on", it will fire up and heat...

The blower doesn't start on "Auto" [ 10 Answers ]

Please someone help me. My furnace Lennox G20Q3/4E-100-5 behaves as follows: 1) Fan is on "Auto" 2) Thermostat calls for heat 3) Green light comes "On" on IPI module and then burner comes "On" 4) Flame occurs 5) Blower doesn't come "On". After a while, the burner stops due to safety. It...

View more questions Search