Ask Experts Questions for FREE Help !
Ask
    ehorto4's Avatar
    ehorto4 Posts: 6, Reputation: 1
    New Member
    		  
    #1

    Nov 28, 2009, 09:40 AM
    Can I wire my furnace for only fan to work
    Replaced mercury t-stat with new honeywell programmable t-stat. want to wire fan switch so fan can be turned on only. Is this possible.
    Joshdta's Avatar
    Joshdta Posts: 2,549, Reputation: 45
    Ultra Member
    		  
    #2

    Nov 28, 2009, 09:40 AM

    How many wires do you have?
    ehorto4's Avatar
    ehorto4 Posts: 6, Reputation: 1
    New Member
    		  
    #3

    Nov 28, 2009, 09:43 AM

    No wire for fan at t-stat. can I run a wire from t-stat to furnace
    Joshdta's Avatar
    Joshdta Posts: 2,549, Reputation: 45
    Ultra Member
    		  
    #4

    Nov 28, 2009, 09:46 AM

    Yes you can run a new wire, you only have 2 wires now? Make sure to turn the power off at the furnace before changing any wires.
    ehorto4's Avatar
    ehorto4 Posts: 6, Reputation: 1
    New Member
    		  
    #5

    Nov 28, 2009, 09:48 AM

    o.k. will the furnace be marked for fan wire ?
    Joshdta's Avatar
    Joshdta Posts: 2,549, Reputation: 45
    Ultra Member
    		  
    #6

    Nov 28, 2009, 09:50 AM

    Your still not answering my question. How many wires doe you have now? Do you have ac or just heat? The fan wire will be hooked to g at the furnace just as it is hooked to g at the stat.
    ehorto4's Avatar
    ehorto4 Posts: 6, Reputation: 1
    New Member
    		  
    #7

    Nov 28, 2009, 09:52 AM

    2 wires now. No a/c. sorry
    ehorto4's Avatar
    ehorto4 Posts: 6, Reputation: 1
    New Member
    		  
    #8

    Nov 28, 2009, 09:58 AM

    Thank you for your help. Auto mechanic by trade. Didn't want to burn the house down.lol
    Joshdta's Avatar
    Joshdta Posts: 2,549, Reputation: 45
    Ultra Member
    		  
    #9

    Nov 28, 2009, 09:58 AM

    OK well I would say if you run a new wire that you pull enough wire to have 5 wires the are and w you have now, you need a g for fan, and with the new stat you need a common wire or you battries will be dying out fast. So if you are going to need 4 wires you may as well pull 5 so you can have the why for ac if so disired later.
    ehorto4's Avatar
    ehorto4 Posts: 6, Reputation: 1
    New Member
    		  
    #10

    Nov 28, 2009, 09:59 AM

    Sounds like a plan. Have my project for the day. Thanks again.
    Joshdta's Avatar
    Joshdta Posts: 2,549, Reputation: 45
    Ultra Member
    		  
    #11

    Nov 28, 2009, 10:02 AM

    No probem

    R to r at the furnace
    W to w
    C to c
    G to g
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!

Furace fan won't stop unless furnace is shut off [ 8 Answers ]

Hi, I have Heil Ultimate II gas furnace with about 13 yrs old. The furnace is working OK except the fan would never stop as long as the furnace is on, therefore, it will blow the cold air when the heating stops. I also tried to disconnect the wire from the board, and fan will still not stop. ...

Wire HRV to control Furnace Fan [ 7 Answers ]

I have recently installed a Venmar HRV. The control panel for this unit offers an Automatic setting where the unit will stop for 40 minutes and run for 20 minutes each hour. I would like to connect the HRV to my furnace so that it turns the furnace fan on for this 20 minute period. How can I...

Furnace comes on but not always a fan [ 11 Answers ]

I have a small Mobile home type furnace. The flame comes on but the fan doesn't At 1st it was iintermittent Then it got worse (this was all yesterday. Under the fan is a box with a removable cover. On top there is a fan switch. Inside there is a transformer with 4 wires and 2 little quarter sized...

Furnace sometimes won't fire, blower fan sometimes won't turn off [ 3 Answers ]

Hi, I have a natural gas furnace that is starting to give me grief. Often when I call for heat the motor and blower fan turn on and I get a blue induction flame, but the tubes won't ignite. At first I would turn off the furnace at the thermostat, wait for the fan to stop (which would sometimes...

Furnace Fan Runs Continually and Randomly [ 4 Answers ]

Chronological Sequence of Events 1.Programmable Thermostat installed in 2007, and was working as programmed 2.New Brock Furnace installed in April of 2009. 3.Furnace has run randomly as if it has a mind of its own, since the installation 4.Sometimes the air is heated and sometimes not...

View more questions Search