2000 Taurus doesn't blow air through vents
I have a 2000 Ford Taurus. It started blowing hot air a couple months ago because I needed a recharge. I went to get it recharged last week. When I picked it up from the mechanic, it was blowing cold air, but only of the top defroster vents. I asked the mechanic what happened and he said, "Must be a coincidence. It never blew out of the front vents as long as we had it."
Even when it was blowing hot air, it was blowing out of the front vents and I heard no squeaking, etc.
Needless to say, I'm trying to see if this is something I can figure out on my own. I was thinking it might be the blower motor but I guess if it were that it wouldn't blow out the defroster vents either. Any ideas? Vacuum issue maybe?