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    twofourty's Avatar
    twofourty Posts: 2, Reputation: 1
    New Member
    		  
    #1

    Dec 22, 2009, 09:48 AM
    How to wire fan to stay on low speed, but still work on normal when furnace is on.
    I have a multispeed furnace fan GE P-8-7505 and would like to run the fan on low when the furnace is off, but still on high when the furnace is on. The furnace is a Lennox Conservator; still works very well with no issues at all. Can this be done?
    Thanks to anyone who has some thoughts on this.
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Dec 22, 2009, 01:53 PM
    You will have to figure it out but the below relay setup might help.
    Attached Images
  1. File Type: pdf Furnace%20blower%20motor%20speed%20bypass.2.pdf (16.4 KB, 204 views)
    2. ballengerb1's Avatar
    ballengerb1 Posts: 27,378, Reputation: 2280
    Home Repair & Remodeling Expert
    		  
    #3

    Dec 22, 2009, 02:07 PM

    Your stat should have a fan switch marked ON?AUTO switch it to ON. The fan will run 24/7 on low speed, when there is a call for heat the furnace will over ride and call for high speed.
    twofourty's Avatar
    twofourty Posts: 2, Reputation: 1
    New Member
    		  
    #4

    Dec 22, 2009, 02:42 PM

    Thanks to both of you for your replies, I think the diagram with the relays is what I am looking for, but need to clarify some of the connections. At least it appears that it can be done.
    Merry Christmas!
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