A/C Problems

[RViper]

I just got a 1999 Buick Regal LS, the ac works great, it's cold, but after about 30 minutes it won't keep the car at a comfortable temperature. Feels like there isn't as much airflow through the vents, even on max fan speed. Any ideas on what it could be?

 

[MelsRegal]

I just got a 1999 Buick Regal LS, the ac works great, it's cold, but after about 30 minutes it won't keep the car at a comfortable temperature. Feels like there isn't as much airflow through the vents, even on max fan speed. Any ideas on what it could be?

The evaporator core is icing up blocking airflow. If you have gauges check hi and low pressure.