Lots of jumping around here. Stay on diagnosing for a sec.
Have you been in a heavy rainstorm without the AC running? Does it still leak? Did you try to make it leak with a garden hose spraying the roof/aC?
Because if it’s an external leak (gasket likely or possibly a thing else idk what) that should have nothing to do with whether the aC is running or not. It can’t suck in the rain as it doesn’t pull outside air in.
But as mentioned it’s possible it’s just condensation from being 105deg and 169% humidity lol.
But yes the most likely leak location is around the gasket. Either too loose, over squished or maybe it’s rolled or pinched. Could a been like that since new.
