Joe, all of us recent Adventurer owners (approximately 2015-2018) have had serious heat issues in those upper front cabinets. Many have had to have electrical equipment replaced due to heat failure. There are many posts here on this subject.
The heat is coming from the black painted stripe on the top of the windshield.
A number of us have removed the mouse fur covered fiberboard that makes up the cabinets and stuffed fiberglass insulation bats across the entire area and up it all back together.
For me this solved the heat issue completely. Here is my post about this process. I know there are a couple of others from other members, too.