Water leaking into RV

If water is coming in through the filter grill, then your drain trough is clogged. Go up to, remove cowling, and flush trough drains out. That will take care of water getting inside. I like to use pipe cleaners and poke through drain holes on either side of the trough.

Excess water is also caused by poor air circulation and coils beginning to freeze up. All is well for a while, until the compressor finally turns off, then you turn fan off and water pours from above. So, while up top, also clean the coils of both the evaporator (located above and behind filter opening) as well as condenser. When cleaning evaporator, take care not to spray water into the inside of the coach. You should not need a special cleaning product unless the coils are very nasty, then use a non hazardous cleaner (you will get some on the carpet down below) such as Orange based. Also change your filter every 100 hours of the fan running (regardless of compressor) to minimize air flow restriction.