Air Condition on 2000 Buick LeSabre

Air condition works but quits suppling cold air from time to time also,water
puddlies on the drivers side...Drivers side is not as cool as the passangers side..Help !!!!!!!!!!!!!!!!!

Asked by for the 2000 Buick LeSabre
Does the car have independent climate control?
yes. I had a o-ring replaced which solved a leak problem but the air is cold on the right side but just cool on the drivers side