On my Flagstaff, the heat is directed through one 4" flexible duct; which turns corners and could very possibly get kinked off, thereby reducing the airflow through the pipe significantly. Kind of like kinking off a water hose that is running- very little if any comes out when kinked. Or it has a duct pipe off. I suggest locating the heater, and visually following the duct hose from it's source to the problem areas- you may have to remove a cover panel or a wall to see inside there for the problem. That is what the dealer will do, and charge you for the repair, not to mention the time without the unit. Happy hunting! Randy
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/SIGPIC]'08 V-lite Flagstaff 30WRLS
'06 Ram 1500 QC hemi Reese dual cam sway control,
K&N series 77 intake, Hellwig helper spgs. LT tires,
Flowmaster "true duals", 380 h.p., Bilstein shocks
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