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

    Aug 14, 2008, 09:09 AM
    Weak air flow
    I have cold air, but I have weak air flow at the vents. What could be the problem?
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Aug 14, 2008, 12:07 PM
    Blocked cold air return.
    Ice build up on indoor A/C coil. (can happen when all the grills/discharge air vents are not open).
    Blower motor running on wrong speed.
    Dirty air filter.
    wmproop's Avatar
    wmproop Posts: 3,749, Reputation: 91
    Ultra Member
    		  
    #3

    Aug 14, 2008, 09:28 PM
    Maybe a dirty coil,,
    HallowellTech's Avatar
    HallowellTech Posts: 2, Reputation: 1
    New Member
    		  
    #4

    Aug 15, 2008, 03:08 PM
    Quote Originally Posted by hvac1000
    Blocked cold air return.
    Ice build up on indoor A/C coil. (can happen when all the grills/discharge air vents are not open).
    Blower motor running on wrong speed.
    Dirty air filter.
    A low refrigerant charge could also be causing ice buildup on the indoor coil dropping the air flow.
    T-Top's Avatar
    T-Top Posts: 1,871, Reputation: 100
    Ultra Member
    		  
    #5

    Aug 15, 2008, 05:48 PM
    Start with a visual inspection of your supply ducts. If one is broke and came apart you won't have any static pressure build up, if all looks good with the supply duct the first,second and third answers on the page is worth checking.
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