AC leaking when running combined with heavy rain

An actual mobile tech, with just basic knowledge, should have already viewed existing gasket, snugged bolts if needed, or suggested replacing the gasket.

Often times an RV that is just a few years old will need bolts snugged up. If you install a new gasket, snug it properly, it too will likely need a bit more tightening, after a couple years of towing, and vibration.

Jerry