No warm air in vent..... Flushed heater core and blend door actuates

Hey everyone. New to the community. I have a 2016 Ram Tradesman with the 6.7 Cummins. Close to 120,000 miles. Got no air blowing through the vents or defroster. I've flushed out the heater core with a garden hose, but no luck. Then removed the glove compartment and tested the cold and warm dial and the blend door turns open and closed just fine. Also removed the warm and cold motor and turned the blend door by hand and can feel it opens and closes just fine.

Just to note, there's very slight warmth out of the head and leg vent, but near to no heat from the defrosters.

Anything I'm missing here?