Mysterious leak

[lady puffin]

I posted about this yesterday under Newmar group. Short synopsis, leak has started over drivers side window, leaks with ac either running cool air or working as heat pump. ac units had been off all day and no need to turn them on last night . Area had dried out. Had faced the sun shine all day. Temp about 70. Last night heavy humidity and coach was collecting moisture on roof. Here is that odd part. We had caulked everything we could find prior to trip and set a sprinkler on roof for 4 hours. No leak, yet with slow moisture such as ac discharge water or condensation it starts to leak and will drip very heavily. This is puzzling and our great rv tech who works on the coach is as baffled as we are. Can the ac discharge or the natural humidity somehow be causing a condensation underneath the roof in the attic space? Has anyone had this problem or heard of it occurring.
Thankyou in advance. Linda

[ga traveler]

I have found the plastic condensation tray in the A/C cracked and leaking the condensation water into the ceiling.

[chunker]

Had a front a/c on a 5th wheel that was leaking in around the vents. When I pulled the cover found that the condensation tray drain was never opened and it was over flowing into the vent. Punched a hole where the drain should have been open and all worked fine.