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

    Dec 21, 2009, 08:03 AM
    Furnace not flaming up all the way
    My furnace cycles on but only about 20% of the flame is on. When I blow on it, the flame spreads acoss the rails. Once its goes off after warming up the room, and re-cycles on,it does it again. Because it does not fully flame up, there is a slight gas odor. What could be causing this>
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Dec 21, 2009, 08:28 AM
    Could be

    Low gas pressure

    Dirty burners

    Defective burners (usually rust or corrosion)

    Blocked flame jumper rails (here again dirt or corrosion.)

    It might be time to have your furnace professionally serviced by a local HVAC company.
    quemado's Avatar
    quemado Posts: 2, Reputation: 1
    New Member
    		  
    #3

    Dec 21, 2009, 08:45 AM

    What causes low gas pressure?
    wmproop's Avatar
    wmproop Posts: 3,749, Reputation: 91
    Ultra Member
    		  
    #4

    Dec 21, 2009, 10:35 AM
    Quote Originally Posted by quemado View Post
    What causes low gas pressure?
    Lack of gas,, could be dirt clogged,, could be at the main outside meter regulater,, the gas valve in your furnace,,
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