Originally Posted by smlranger
Had same issue with BR AC. Kevin Waite told me to take the drain hose loose in the AC unit (from inside the coach) and blow it out with air. I did and a glob of goo (looked like a dead insect) came out of the drain hose at rear of coach. Worked for me.
I believe our Coleman AC units have a little sump pump that moves the water out the drain. I've never had one apart but I have read where others have had to remove the AC cover and clear out that area.
This would be my first step too. I also do a yearly 're-snug' of the four bolts holding the AC onto the roof. Also accessible from inside of the coach. Vibration can cause some loosening. I was told to not over crank them, as too tight can be as bad as a bit loose
I've heard on other coaches that have drain pan hoses, that the pans themselves can sometimes crack. Never heard of this on a CC, but does not mean it is not a possibility. So if the clearing of the drain hose does not get you dry, then that would be worth checking too.
Best of luck to you on this!