I have an 05 2500 CTD. No recent work done to the truck and it is STOCK!! Got in today and the A/C LED won't come on and neither the temp control or vent regulator work. Fan control does work. I've checked the under hood fuses and all looks good there. I've looked here at the archives and don't see my problem.

I removed panel and reseated the electrical connectors for the climate control panel. No change!

Is there another fuse panel that controls these functions?
Has anyone else had this problem?

EVERYTHING worked fine a few days ago!!

 

This is odd. I was just about to post the same question you just asked. Mine just started doing the exact same thing. Only thing that works is the blower. I have also checked all connecters and Hvac fuse. Anyone have any ideas?