When i turn my blower speed **** i get no air blowing at all. I do know that i have heat bc when i am goining down the road u can feel heat coming threw lightly, like the force of the air from driving is pushing it threw the system. of course this is only with the recir. turned off. No matter which way i turn the **** i get no air coming threw the vents. this happenned a few weeks ago aswell, i just shut off the truck and went i got back in it it wld not work, but a day or 2 later it started working fine again. i have the duel climate if that helps. I am thinking possible blower resistor or head unit, as i dont think its the motor itself. Any help or diag advice wld b appriciated

 

If the fan is not running, look at the resistor pack and/or the blower motor. The resistor pack is cooled by the blower, and if the blower goes out, it sometimes burns up the resistor pack.

If the blower is going, then look at the doors inside the ducts. They do go bad and are a pain to fix. I hear you can take out the blower motor, and reach your hand in and move them and maybe do something to make them stay till you can get them fixed later.