so i got a 98 zj. the air was working great til the other day, it is digital and the heat kicks in at 72, lowest is 55 for ac. i had it set on like 62, and it started getting warmer and warmer. now its not even cold or luke. its hot air. still blows. im thinking its a switch but not sure where to go. not sure if its the high or low switch. or even the ac clutch switch. where is it at on this thing?? thanks guys