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

    Jan 29, 2009, 11:07 AM
    Loud Bank when Furnace shuts down
    We have a 2 year old furnace that is attached to the basement ceiling. When it shuts off there is a very loud combustion type noise. It's scary it's so loud. Any ideas? Thank you
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Jan 29, 2009, 11:11 AM
    My best idea for you is to call for a On Site Inspection of what that furnace is doing. A loud bang is never a good sign. Now it is possible the blower cage is loose on the blower motor since that can make a sound when turning off. To check that turn off power and remove the blower motor access door. Then check to see if the cage is loose.
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