Poor AC performance or no cold air blowing from vents is commonly caused by a refrigerant leak from the AC condenser. Road debris like rocks or pebbles can damage the condenser tubes.
Average mileage: 123,459 (65,000–236,897)
29 people reported this problem
Noticed a neon green leak under the front end. Initially, I thought antifreeze, but my coolant is red so it had to be the condenser leaking. That was in January, but for a couple of years the ac didn't blow very cool unless we were moving. This is a sign, check it out.
Leaks aren't very evident at first because the first drops land inside the bottom of the front bumper's plastic liner. Also, the condenser is so close to this liner that pushing into something like a snowdrift can add pressure to an already weak condenser and finish the damage. I believe that's what finally did it for me.