hot

Hey guys, I have a 2002 Tahoe with automatic AC control in the front (single not dual as in passenger and driver) and a separate rear ac. This has been going on for a while but I've finally reached my boiling point with this. My front AC will sometimes blow hot and sometimes blow decently...

I have 02 tahoe and it has the heater control with the auto feature. Anyhow if it's set all the way to cold, cold comes out but if I turn it 1 click above cold.... Hot air trickles out. I can't make any type of warm air at all. Need help diagnosing it please.

Living in the south, I rarely use 4WD but needed it a few weeks ago driving on the beach. (Sounds like a few of us in this forum like Carova Beach) Nonetheless, I went to turn it from 4WD to 2WD and the twist knob was really, really warm. Is that normal or should I have the dealer check it out?