Auto Air Conditioning & Heater Repair: 2004 Chev dual zone temp controller, programming problem, dual zone

Question
QUESTION: My passenger side air flow is either hot or hotter.  It's been that way since new.  Any Ideas?  Thank you.

ANSWER: Hi tom

Get me some pressures  and we will start.

---------- FOLLOW-UP ----------

QUESTION: Do you want compressor pressures?  The AC works fine.  I just cant make it go to the passenger side.  Thanks

Answer
No its OK you answered it.  You have an actuator problem.  I just needed to rule out that the system was low refrigernat. But, if you say it is cold on the  drivers side then you have an actuator or a programming problem.  If you cannot get to a scanner to reset the system.  Then let just disconnect the battery and reconnect and see if it resets itself.  If that does not work then you may have an actuator problem.  You must put it on a scanner and get the codes.