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    Sammy Frost's Avatar
    Sammy Frost Posts: 4, Reputation: 1
    New Member
    		  
    #1

    Jan 28, 2010, 09:36 AM
    Loud hum after furnace stops running
    After my heat pump furnace shuts off sometimes it has a loud hum for a minute or two and then a whoosh and it stops. What is causing this?
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Jan 28, 2010, 11:18 AM
    Refrigerant moving around. This sound is normal not like your other posts.
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