I have a 2000 328ci with 230,000 miles. I am having issues with the A/C. Some trips it will blow cold and work perfectly fine, but then other trips it will blow luke warm air. I did notice that when it is blowing luke warm air, the vent by the driver side door does blow somewhat colder air.

Does anyone have an idea what is causing this? I believe it doesn't need to be recharged.