I have a 1979 Pontiac Bonneville, and whenever the A/C control is in the off position, i can still hear the motor turning and feel a bit air coming from the bottom vents... What could the problem be? Thanks.
Thats there by design. It's the "ventilation system" providing "ventilation comfort". You should see the air flow diagram. It's in the owners manual. ElectraJim
GM started doing that when they did away with the wind wing vents. I think, they called it Astro Ventilation?