2000 Jeep Grand Cherokee no HVAC Blower settings?

Okay basically i have a problem is my 2000 Jeep Grand Cherokee with the straight I6 motor and 169XXX miles well i have no blower settings at all the blower fan for the heat and ac works i can feel very little air coming out the defrost vents but when i switch it to floor nothing comes out or face/floor nothing or face/defrost i only feel a little going to the windshield defrost. Its not my fan motor because it changes speed as i change the fan speed my problem is i just have no directional control of the air flow and i have no idea why? We checked i have no vacuum leaks so now what? all i know is before it stopped working i heard what sounded like something breaking and being tossed around inside the dash. Does anyone know what the problem may be? We thought it was a vacuum leak since i just had my radiator replaced but nope i have vacuum to all lines. I hope its not my blend doors????