Thought I would provide an update in the event others are having a similar issue. Forest River has agreed to have Camping World remove the underbelly of my trailer to look for an additional 8 ft.
of heating duct that may have been installed (apparently they have had similar issues). Why they didn't tell me that earlier I don't know. If that is the problem hopefully they can correct it. If not Forest River will review my request to have the inline fan installed to enhance air flow. Hope the weather warms up. Enjoy the season.