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    grizz09's Avatar
    grizz09 Posts: 2, Reputation: 1
    New Member
    		  
    #1

    Nov 13, 2009, 08:51 AM
    Coleman furnace
    We have a coleman furnace. The model number is 3400a816. The heating element comes on, but the fan will not come on unless you put it on manual.
    T-Top's Avatar
    T-Top Posts: 1,871, Reputation: 100
    Ultra Member
    		  
    #2

    Nov 13, 2009, 05:14 PM
    You have a bad sequencer or with some models the thermostat brings the blower on in heat mode. Is this a new thermostat your trying to use?
    grizz09's Avatar
    grizz09 Posts: 2, Reputation: 1
    New Member
    		  
    #3

    Nov 17, 2009, 11:32 AM

    No its not a new thermostat.
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #4

    Nov 17, 2009, 12:18 PM
    I am with T-top the sequencer is probably defective.

    Part number

    3115-3571 Sequencer

    Sequencer controls the sequence in which the heating elements & blowers turn on. This one has the ability to control up to 3 heating elements. Replaces 3400-357, 3400-3571 & 3115-357

    Your furnace parts list see this page

    Coleman Electric Furnace Parts

    Order page


    Coleman Electric Furnace Parts
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