Originally Posted by Just so fine
Not sure this is your problem, but I had a leaking AC for two years. Did all the things mentioned in other posts to no avail. Then one day I switched my fan from hi to low and the leaked stopped. Seems in hi humidity situations the holding pan filled to fast and overdeveloped flowed in to the RV. On low it had time to drain out. Just what happened to me.
We live in S Louisiana and it is nothing here if not humid.
Sometimes if the unit is not perfectly level water will pool where there is no drain.
If it is such a drainage problem, take the cover off, let it run an, see where the water pools.
Drill a hold there to let out the water before it overflows into your camper. (Put a block of wood under the pan so you don't accidentally slip and make a hole in your roof)
Put the cover back on and never look back.