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    ken246fun's Avatar
    ken246fun Posts: 2, Reputation: 1
    New Member
    		  
    #1

    Jul 23, 2013, 08:25 AM
    Hvac
    My hvac blower motor works in heat mode only not cooling, will not work with manual mode either
    Joshdta's Avatar
    Joshdta Posts: 2,549, Reputation: 45
    Ultra Member
    		  
    #2

    Jul 23, 2013, 04:20 PM
    Not knowing what brand unit you have it is either fan relay or the control board is bad
    Grady White's Avatar
    Grady White Posts: 1,417, Reputation: 59
    Ultra Member
    		  
    #3

    Jul 25, 2013, 07:05 PM
    With the little information given, I would have to suspect either a bad fan motor or fan relay. The relay could be on a board or separate. Another possibility is a bad thermostat or thermostat wiring. The 'G' terminal on the stat & the wire between it and the furnace are the source of the control for the fan in cooling & manual fan. If 24 volts is not getting back to the 'G' terminal on the furnace the fan won't run in cooling or manual fan.
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