View Full Version : 98 Cadillac DeVille Air Conditioner / HVAC problem

06-20-2010, 05:08 PM
I am having a problem with the HVAC system on my 98 DeVille. It's blowing hot air out of the A/C vents on the drivers side and cold air from the passenger side vents. It's 100 degrees F outside, so I would prefer cold from both sides. Under the hood the dryer and freon lines are nice and cold, so it's most likely an under the dash vacuum issue.

Does the Haynes Manual on my car address detailed diagnosis and repair of this problem?

06-21-2010, 06:00 PM
Hi swwjr05,

No, the Haynes manual for your car doesn't get into automatic climate control system diagnosis or repair. Much of the diagnostic routines for that system is dependent on a special GM scan tool.