2002 Surburan AC Dual Zone not working
 

My front AC blows air, but not cold air. The rear AC blows cold air. Guessing it's a sensor issue? Any thoughts?
Thanks

check operation of the temperature blend doors in the front hvac case....make sure the actuator for the door is moving.

iam going through the same thing my back AC blows very cold air my front like regular air not cold check the actuator door works fine opens and closes like it's supposed to a freon was just charged at Firestone so if you find out any information of what it could be please pass on the information thank you