2001 Dodge Ram hmmmm.

I have checked my blower motor, it works fine at all speeds! I can be driving down the road and the volume of air will go from strong to very little even though I havent change a setting? Is there a electronic or vaccum controller door that might be sticking? If so where is it at, for I am not afraid to pull the dash, I have done so to change heater core! By the way this started before I changed the heater core so it wasnt something I did to it in the process of removal or assembly. I have checked the blower motor and it appears to change speeds.