A/C only blowing through the defrost vents and lower vents?

Good morning,

There is an actuator behind the glove box that controls air flow to the vents. They are common failures for this issue.

https://www.2carpros.com/articles/low-or-no-air-flow-from-vents

I attached the procedure and a picture for you below of the repair.

Roy

Removal and Installation

1. Remove the passenger airbag module. For additional information, refer to Section 501-20B (SEE Restraints and Safety Systems &/or Air Bag Systems).

2. Remove the 3 panel/defrost door mode door actuator screws.

3. Reposition the panel/defrost door mode door actuator and disconnect the panel/defrost door mode door actuator electrical connector.

4. Remove the panel/defrost door mode door actuator.

5. To install, reverse the removal procedure.

6. NOTE: Because the battery is disconnected as part of the passenger airbag module removal procedure, the HVAC module will initialize and calibrate the actuators when the ignition is cycled to the ON position. Calibration of the actuators will take approximately 30 seconds.

Cycle the ignition switch to the ON position and wait 30 seconds before verifying correct panel/defrost door mode door actuator operation.

It is the one behind the glove box to the left and the connector aims high.

Roy

Middle left.

Roy

I attached a wiring diagram of the actuator. We need to do some testing to see if the correct voltages are going to the actuator.

https://www.2carpros.com/articles/how-to-check-wiring

https://www.2carpros.com/articles/how-to-use-a-voltmeter

Let me know when you are ready.

Roy

You will need a voltmeter so we can do some checks from the control head.

Roy