Correction
I'm just making a correction to this DIY. The OP said that removal of the unit was twisting counter-clockwise, but that is incorrect. The blower is removed by twisting clockwise (if you are on your back looking up at it) and reinstalls by twisting counter-clockwise. This is fresh in my head since I literally did this 10 minutes ago (sprayed the upper bearing with PB blaster to quiet it down). I have to smell PB blaster now for a few days, but it's better than listening to the racket the blower has been making on cold mornings here in the Northeast
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