Air won't blow out dash vents - 1998 Oldsmobile 88

SOURCE: there is no air blowing out the vents on the dash board when i turn the ac on

you have a bad control unit, the thing you use to switch from one thing to the other, it needs to be replaced.

SOURCE: there is no air coming out the vents on the dash board when i turn on the ac.

already answered it.

SOURCE: Air won't blow through dash vents under acceleration

there should be a vacuum line running by the drivrs side shock tower that might be unhook are cracked

SOURCE: 98 Olds LLC - AC works but fan air does not blow

If you have a late model GM car and the system is controlled electronically the blend door actuator becomes weak. When this situation occurs it will not move the air direction door inside of the heater/air conditioner plenum. in your case not to the vents Replace the actuator with new and recheck the system. i hope this helps

SOURCE: I have a 1993 Olds Cutlass Supreme. The Defrost

the heater control panel possibly bad. the panel where your heater is at. on the dash,actually where you're turning the directiona for floor and dash, or it could have a bad connection on switch behind the panel.have you spilled liquid on dash in the past? if so you may be able to pull the panel and clean it in order for it to work again. hope this helps!!!