Rick, welcome to iRV2. You need to post a bit more information...Size and model of the Arctic Fox. There should be floor vents in the various rooms. If your furnace is mounted to the rear of the trailer, it may have trouble pushing air all the way to the front. It is possible you have a dust or hose loose.
Amateur Radio Operator (KE5DFR)|No Longer Full-Time! - 2023 Cougar 22MLS toted by 2022 F150, 3.5L EcoBoost Tow Max FX4 Lariat Travel with one Standard Schnauzer and one small Timneh African Gray Parrot, retired mechanical engineer