We have a one year old Wildcat Fifth Wheel that has leaked on us a couple of times during the rain with the AC running. Slow drip. Doesn’t leak when AC is running and it’s not raining – so I don’t think it’s a drip from the AC unit itself. I’m wondering if running a strip of Eternabond tape around the AC penetration would be a good place to start?
I could be totally wrong here but I wonder if it isnt condensation somehow causing the drip. I dont know how RV AC units are mounted or sealed but i would investigate condensation before taking things apart very far. I know most, if not all, AC units create condensation especially during humid times (during a rain storm). Perhaps your unit is not removing this properly. It also could be the ducts or vents get super-chilled like the outside of a iced beverage glass. The slow drip seems suspicious to me.
Thanks for all the suggestions. I’m planning to uncover it this weekend to see what I can find. It’s never leaked when it wasn’t raining which led me in the direction of the rain leak and away from a condensation leak. BUT we’ll see. Thanks again and I will let y’all know what I uncover.