Having problems with my 85 Tbird. The air isn’t coming through the vents or defrost. I had to clean a lot of stuff from the blower motor since the car sat in the garage over winter. Is it possible more stuff/debris is in the housing and how difficult is it to get to. I can’t run codes yet because I discovered my alternator needs replaced and can’t do that until next weekend. Also the blower motor is still very loud which usually means debris is still there, correct?