Non-mopar tech question, sorry...
when I first got Ginger she didn't have any heat either (still doesn't but that's another story)
I didn't think nothing of it, because I had bigger fish to fry
when it was time to yank out the /6 to make room for a 360 I disconnected the heater hoses only to find an allen head bolt lodged in one of them
my guess is she has a leaking heater core, and someone though this was great way to stop the leak