[volvite]

Hey all. I have a 99 WJ with the dual Climate control system. Now that it's gotten cold again, i seem to have problems with my heat. I have done some searching on the forum but haven't found exactly what I'm looking for. When I have the heat on HI for both sides I have really hot air. However when I lower even in the 80 degree range it goes cold. I think it's the blend doors, but everything I read says there is some kind of code that comes up. I'm not sure where the code would be displayed. Also I have no check engine light or code in the top display. Any help you all have would be great. Thanks.

[Kruzin]

Read the sticky FAQ thread.
It will tell you how to pull codes from the heater control module.