I've been having weird air conditioning issues with my 2001 Suburban. Generally, I'll run the AC for an hour or two and then it will stop flowing. I can hear the fan blowing, but the air stops coming through the vents. After a while, the air randomly starts coming through the vents again. This is only the front AC, not the rear. I've also noticed that there is almost always a light fog on my windshield. Then this morning, after the car had been parked all night, my wife drove off and I saw a bunch of water come out from under the front of the car -- as if the AC had been on for a long period of time and water was dripping. I'm wondering if it's possible that there is water getting stuck somewhere in the AC or the ducting. If so, this would explain the water in the morning (after the car hadn't been driven for 12 hours) and the cold air stopping after a long time of using the AC, but coming back on randomly (as if the water somehow drained and allowed the air to flow again. I recently had the AC system recharged. There were no major leaks, but it need about 3 pounds. I also do a lot of off-road driving -- in fact the car is off-road most of the time -- so the car gets jostled a bunch and a lot of dirt and sometimes rocks get thrown up against the chasis. Any help or troubleshooting suggested appreciated.