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    jackhodges19's Avatar
    jackhodges19 Posts: 2, Reputation: 1
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    #1

    Aug 6, 2010, 09:54 AM
    Lennox 13 ACD A24 Condensing units. Making intermittent humming
    Anyone have any idea why the condensing unit would be making intermittent humming noise even though it is cooling and seems to be operating properly. The humming continues intermittently even when the unit is operating.
    wmproop's Avatar
    wmproop Posts: 3,749, Reputation: 91
    Ultra Member
    		  
    #2

    Aug 6, 2010, 10:31 AM

    Perhaps a relay
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