May just be an air bubble in the system. I would try to burp it.
Keoni, Flush the heater core with water, fill the core with CLR, Let it sit for 30 min, flush it back in the opposite direction of water flow, connect the hoses and you should have nice heat
I wanted to post up and say thank you to Ed aka Jkmadness.....He emailed me details on exactly what to do....I did it and the Jeep blows crazy hot heat again...Thanks Ed, you are a true Jeeper!