When I try to switch my rear A/C from feet to head, it shows that its going through the head but only comes out of the feet vents.

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ID Status Date Year Make Model Transmission Type A/C Controls Public/Private
#13261 Closed 2014 GMC Acadia public

All of my air works in the car except for my rear overhead vents. Every time I try to change from the feet position to the head position, the air flow does not change. I have tried changing from the front of the car and from the rear controls with no luck. Heat doesn’t even come out of the overhead vents.

Sparky

Do you have auto or manual controls?

Do you have access to a scan tool capable of communicating with the HVAC systems?

Has any work been done on or around the rear HVAC unit?

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