Shoot, I spent 10minutes commenting on this topic this morning and my message NO SHOWS. )*^%$U* oh well...
Okay,, try again,,, first thing,, you need to go on the roof and look...By the way did you get on the roof??? now if you can not ,,,get you a kid from the neighborhood and under your supervision use a long extension ladder let him/her get up there and be your eyes. Take some pics. According to your earlier post there was a lot of water in the RV when it leaked,,, you were parked....
Pressurizing like an inner tube. hmmm. okay this may be hard to do,,,,someone needs to be on the roof again,,, but when you turn on your air you can feel the pressure inside the unit go up,,, just wonder if this would be enough to get some bubble leak on the top...
tom mentioned letting water run on the top and checking by area,,, I think if you got a spray bottle and went around the caulked areas,, spray wipe, spray wipe, you might be able to spot a bad caulking area,,, since your unit is new the caulk should look great....( I'm still voting on the antenna being the problem)
One last thought,,, you were out in May,,, raining,,, were you running the AC unit? could the drain tube be plugged? would be real easy and right on for the AC if plugged to run inside the roof to the chair... a lot of the tubes get stuff in them especially when new,, saw lots of post on units and the drains etc,,,, I am not sure about this,,,, I only ran my unit once for couple of hours on last trip was getting the water from the AC off the rear end,,,, have not looked at the manual just to run... maybe some of the guys have some suggestions for checking,, guess you could run the AC for an hour or two and make sure it's draining ok
Keep us posted
David Sparks
2008 PC 2350
Houston