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    Snowing's Avatar
    Snowing Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Dec 28, 2007, 12:48 PM
    No hot air
    Furnace is blowing cold air, changed thermostat, worked for a while, but now it's back to blowing cold air
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Dec 28, 2007, 12:55 PM
    Need more information. Why did you change the thermostat?
    What is the brand and model number of your furnace.
    If it worked for awhile it might be just a loose connection.
    Snowflakes's Avatar
    Snowflakes Posts: 4, Reputation: 1
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    #3

    Dec 28, 2007, 01:28 PM
    The brand name is Coleman 3800
    Snowflakes's Avatar
    Snowflakes Posts: 4, Reputation: 1
    New Member
    		  
    #4

    Dec 28, 2007, 01:31 PM
    Its not blowing hot air, just cold air
    Snowflakes's Avatar
    Snowflakes Posts: 4, Reputation: 1
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    #5

    Dec 28, 2007, 01:35 PM
    The furnace, a coleman 3800, sometimes blows hot air and sometimes it blows cold air, could it be the thermostat, although it was changed recently, it seems there's not catch from the thermostat
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #6

    Dec 28, 2007, 02:52 PM
    It sounds like you have a intermittent problem so it could be just about anything.
    If your furnace has a flame sensor try cleaning it.
    Look at the sticky notes at the beginning of this board for more info.

    Is this in a mobile home?
    Is this in a travel trailer?
    I have no listing for a 3800 series Coleman.
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