My fan for the heater and air just quit working. It worked about an hour ago when I went to town but on the way back I tried it and it don't work. I checked all the fuses and they are alright. I am lost as to what to look for.
Ken

Do you have manual HVAC or automatic climate control?

I have a 2001 2dr 4wd Blazer. I have manual HVAC.

I would check your blower motor. It could be bad. If not that, then maybe a relay.

Your system has 4 blower speeds. Do any of the speeds work?

I think I found the problem. As I was checking things out I bumped the wiring harness and the fan came back on. It quit again and I moved the harness and it started right up again. So I think I got it narrowed down to where the problem is.
Thanks to all who replied

Ken