AC vents only not blowing hard

[timp]

I know it's common for the recirc door to break on these trucks and limit the air flow, but mine is fine. And I thought it may have been the speed selector resistor, but if I switch from ac to the floor vents when it is on high then it blows out normal. It's only when it's on the vents and the defroster that it blows at low speed no matter what speed I choose.

So there must be another door that redirects the air flow from floor to vents to defroster. Could this be broken, and if so, does someone know how to get to it? Or could there possibly be something that has gotten stuck in there blocking the air. I have gotten leaves and acorns in the fan before so didn't know if something could've gotten stuck in the vents somewhere.

Thanks in advance because I know you guys are geniuses!

 

[mhylman]

I still say resistor but I'd check to make sure your little vacuum lines underneath are all connected first. All mine sit behind the air bag module in the dash but I have the older dash.