Why don't my heater get hot

Yeah, that's my 2nd presto moment thanks to this sight. I'm starting to dig the sh** out of FABO. My car is better and my understanding of it is better. I'm kinda shut off here in the backwoods of east Tx. Not much old Mopar knowledge around here. You folks have more than made up for that in a short time. Once again, many thanks all around.:cheers: