I have a Trane XR80 furnace, circa 2002. The blower motor died today.
I purchased a new motor and replaced it. Started the A/C and it blows great, but now on the first floor above the furnace I have what sounds like the washing machine on spin cycle.
I looked in and spun it and it doesn't seem to be wobbling or hitting anything. The set screw is tight, I even went around the furnace and tightened every screw.
Any ideas on what to look for or how to fix? It seems out of balance, but everything went in the way it came out