Same thing. Cleared out the drains. The drains aren't hoses, but simply holes on the bottom of the collection pan that drain out onto the roof. Like someone said, they are small and clog easily.
I had to take off the top covering, then the sheet metal cover over the coils. With a flashlight you can see inside and where the holes are on each side of the drain pan. Assuming your air conditioner is similar to mine in the 17C.
2008 Jayco 17C Ex-Port
2014 Toyota Highlander