A/C is out and not blowing...electronic issues

I have a 1997 4x4 chevy blazer. I just bought it, and the 30 day warranty is out. Is wasnt till a few days ago, I drove it at night, and used my lights. When I have my head lights on my right blinker light stays on my dash, but not outside the vehicle. When I turn lights out, that light goes out too.
Two days ago I noticed smoke coming out of my A/C blower knob. I also noticed my blower cutting on and off randomly. Well today I got in my blazer, and the A/C blower does not come on. I know I have electronic issues, but does anyone have any idea on what to do from here?

Thanks!

I guess I would check the fuse first. Clean away any crud in the fuse box. Was it smoke (as in burnt stuff) or fog (not burnt stuff) coming out of the vents? I have had fog come out of the vents before and it has not been a problem.

No, smoke..as in burnt came from the blower knob...where you raise the blowing level

You fan is blown or you have a HVAC assembly that has shorted out.

What is HVAC?

heater controls.

Yeah, I got in my blazer today, and now my A/C is back on.

Yeah, I got in my blazer today, and now my A/C is back on.

What was wrong with it?

I have no clue..it just started blowing again.