heater problem

2011 SE I have no climate controls. Have searched on here and see common issue where people can't control heat/cool, but that's not my issue. Issue started after I was having trouble with my 4.3 Uconnect system. The screen was black, but climate control dials/buttons worked fine...I just...

So I have went back and forth with Dodge. They have determined that everything up to the firewall is working correctly to generate heat. However, this is where I get confused. The dealer stated that the "heater box" is malfunctioning and is not allowing heat to flow to the vents. The actual...