I have a 2010 JK, and I was wondering if anyone else was having heater issues. Or if this is just something I'm going to have to get used to. The passenger side vents will blow out hot air, while the driver side vents only blow out warm air. So, my problem is, by the time I get warm, my passenger has been fried to a crisp When I select the "Floor" option on the controls, I don't even feel any air in the drivers side floorboard.
I would have the dealership check the blower control unit and the blower. The blower has little doors that move to whatever position you select with the control unit (knobs). Most are vacuum controlled, but some are either mechanical or electrical. I don't know what the JK has. My heater works well, so I haven't explored.
Try pushing the RECIRC button on the bottom of the Fan control--
The RECIRC feature will not activate in this feature. I tried it on defrost only, defrost and feet, and feet only, wont come on until you have some air directed out of the top vents. So this doesnt help with this particular problem.