heater vent control doesn't change air distribution

Sounds like this may be the HVAC Blend Door Actuator that directs the air flow from defrost to vents to the floor. It is an electrical part up underneath the dash board, attached to the vent system somewhere.

Thanks for the info. I was afraid it might be something up behind the dash - not the easiest to get to - but I'll look for some help online as to how to access it. I was hoping it would be a loose/broken vacuum line, but that would be too easy.

More info about my problem: The remote trunk release on the door doesn't work, and the diagnostic trouble code plug under the dash doesn't connect with a code reader. Apparently the climate controls are operated electrically, and I wonder if all these symptoms are related to one component in the car. Any help is appreciated

Possible, on older models the scanner plugin tied into the cigarette lighter power supply, so yours may be tied into the HVAC control power circuit. So all you would have to do to check would be to get a test light and check for power at the plugin of the HVAC control module, or at the trunk release circuit. Look for blown fuses also.

The Actuator is found behind the glove compartment.. You must remove 3 screw in order to remove the glove compartment..The Actuator will be on the left side.