Timberwolf Black Label A/C issues

[Junior357]

I just became the owner of a barely year old Forest River Cherokee Black Label trailer. The original owner used it only twice and I took it over. It has only one issue. The front upper A/C blows Ice cold just like the rear one in the kitchen/living area. It has (2) vents in the lower master bedroom. None in the front bathroom. We are bearly getting air flow down below. Same as with the other vents. But the quick cool dump is pumping out masses of cold air. We closed it to 2/3rds and still got the same thing. no noticable difference. Anyone else have this issue with the duct work? Short of locating another unit and putting it in the front of the trailer under the bed. Any suggestions?