If you have digital display temp read outs for the driver and passenger you have the automatic control.
Since the blower is working it's not the final stage resistor.
The front auxiliary fan should come on when the compressor comes on and should remain on as long as the compressor is running. One pipe should be HOT (Red cap) and one pipe should be Cool (Blue Cap).
The Indy that checked the pressure in the system, did he tell you what the High side pressure was and did he tell you the lowside pressure? What was the air temp when he did the check?
Need this info in order to help you.