my air conditioner is cool, but doesn't blow out the vents. What is wrong with

sound like a vacumm problem or you need to reseal plastic passages underdash the air routs correctly,

Recommend buying a scanner if its an automatic climate controller that you have. Scanners are getting reaonsable and thats the only way I know of to pinpoint these issues of automatic climate controllers on the lesabres. Good Luck. OB II scanners 15 -50 bucks.