I've got several problems with the climate control on my '02 Dakota. A/C doesn't even turn on. I've got no temperature control. Just blows full hot and can't direct airflow. Blows only through defrost vents. Fan only works on high but I believe that's the resistor. Thanks for any help.

 

Are the vents in your truck vacuum controlled, or electrical? If the former, I would suspect a broken vacuum line somewhere.

 

'02 is electric. Check fuse #25 in the junction block by the drivers door. Should be 10amp. It supplies power to the HVAC controls.

Agree it's likely a bad resistor for the blower speed.