Chris, you can try opening glove box, push in on the tab in center that is used to remove the glove box?-with me? This will allow you to see inside that area, maybe see that the duct has fallen down, become disconnected etc, look down onto the heater/evaporator box, or big black box, look to see if any vacuum lines have come disconnected, could be a door inside the box isnt opening... and thats all from me, im not even gonna tempt you on digging into the heater assembly (black box)[-cant remember the correct name for it-] cause its a bear! Bill