We have a 1999 Winne 37' coach. The engine is a Ford V-10. My situation is when we run the AC, it blows through the defrost vents at the windshield. I have selected the different positions on the swit...
The damper "doors" are vacuum operated. That loose hose likely IS your problem. If you can't find where it goes, you need help from someone who knows. Make some phone calls.....to RV dealers or Ford truck shops.