I also noticed that in the top vent there was a thin piece of plywood that was ripped off and out or the top vent as evidence of splintered and jagged edge in this lower right side in the picture. My friend had a coachman 2016 Liberty same floor plan and his top vent was 80% covered with plywood and his worked properly. Again, Forrest River says it is not needed.
Bill & Cindy McKenna
2015 Palomino Puma 32DBKS
2005 Ford Excursion 6 liter Turbo Diesel