Dodge Truck AC leaking water inside cab

My brother has a 2002 Dodge Pickup with a 318 V8. It is leaking water inside the cab on the passenegr floorboard from the AC unit. We tried checking the drain for the coil but it does not seem plugged up. No other leaks in the system. Any Ideas why this is not draining outside instead of inside. Thanks in advance. Take Care. Paul Kinsella

My brother has a 2002 Dodge Pickup with a 318 V8. It is leaking water inside the cab on the passenegr floorboard from the AC unit. We tried checking the drain for the coil but it does not seem plugged up. No other leaks in the system. Any Ideas why this is not draining outside instead of inside. Thanks in advance. Take Care. Paul Kinsella

I don't know how he is checking the drain,But I have found over the years that a long blow gun and compressor does the best job,Sticking a wire or something in the drain doesn't do as well.