Heater/AC fan problems

I have a 95 Blazer that my son bought used and I inherited while he's away at school. I have finally fixed most of the major problems, so now I'm working on the little things now.

The problem is when you leave the heater or AC on when you turn off the car, the fan doesn't work when you restart the car. Easy fix was just remember to turn it off before shutting down the car, however every now and then you forget. Sometimes it takes awhile to get the fan going again. Also it seem the low end speeds on the fan are non existent or so low that its hard to tell if anything is coming out.

Could it be a vacuum problem? Or just a bad fan motor? Or the switches? Any Ideas?

Sounds like your fan is shot.

Replace with one from a wrecking yard.