My Trane (XL80) furnace had been making rattling noise when it kicks on (both AC and Heat). I notice the rattling noise came from the blower. Sounds like the blower's not stable, perhaps, the balance weight or something came off. Is there anyway I can take out the blower and check it out? Is it hard to do? Please, instruct me how to take it out if possible. The blower's on the bottom of the furnace and it blows the heat to the left; I did not see much space to maneuver and remove the blower. Please, let me know if this can be done by an amateur or do I have to call the professional.
Thank you very much in advance for your advice.

The blower is made to be removed, a couple of screws and disconnect the wiring and slide it out, blower wheel may have come loose or dirty. Turn off power first, Good luck. Mike