Why does make attic fan make noise at night?

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Old 07-06-20, 08:38 AM
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Why does make attic fan make noise at night?

Can anyone explain why my attic fan makes noise at night and during the day it runs without making any noise? Thanks
 
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Old 07-06-20, 09:15 AM
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You probably don't notice the noise during the day. Too many other distractions. Also might be change in temperature causing the framing or fasteners to move slightly.
 
 

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