hey guys this will be my first here so maybe ill get lucky here. i just got this blazer ive always wanted one. everything works o.k now except the a/c control thing under the radio controls. i have absolutely no heat at all but truck runs real strong and it was like 50 degreese out to day still nothing.all of the lights work and everything. another problem is that the fan only works on high setting ive heard that it could be a resistor chip or something behind glove box? am i going in the right direction there. as for the heat issue im lost any help would be most appreciated im not looking forward to driving this thing when the temp drops again and no heat.

 

On the heat issue, I would check to make sure that the heater hoses are still connected. If they are, it could be that the heater core is plugged up. You will not know until you flush the core.

As far as the fan goes, the resistor block is the first thing I would check.