A/C leak inside when A/C vents open.
I have 2 A/Cs in my FW. The one in the living room has 3 vents you can open to make the air come directly out of the unit or you can close them and have the air scatter in other vents around the RV. W...
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A guess, the fiberglass stuff is mis-located duct insulation, you may be getting condensation in the duct. Maybe.
