Just a note to everyone about their a/c unit. Inspect the top cover annually, making sure the 4 special shouldered Philips headed screws that mount it, are tight.
I never thought of checking mine. One day while on the roof cleaning it, I noticed a missing a/c cover screw. The other three were loose. I ordered 4 screws (3 extra) from Camping World. They came one at a time, each screw in a huge box about one cubic foot in size. Camping World lost a massive amount of money fulfilling my order of 4 screws. My wife and I had a good laugh over that.