My 2000 ESC climate control system is putting hot air out of the driver's side vents and cold air out of the passenger side vents. It makes no difference if the system is in "Auto" or "Manual". When I change the temperature setting, it does change the output temperatures but this "split" is still present. Cycling the passenger side controls also has no effect.

Any ideas as to what may be causing this problem?

 

same thing happen to me and i took out the glove box and i found that the mechanism controlling the vent had malfuctioned . and theres like a lil metal control arm that attached to it that opens or closes to control the air mixture

 

Thanks for your time. I was wondering what your outcome was. I have a similiar situation on my 1996 Seville. By manually disconnecting the air mixture door from the motor control, I have corrected the problem...so, I figure the motor control is defective. I would appreciate your feedback. Thanks.