AC only blowing on defrost?

2011 sr5 access cab only blowing ac through defrost vents. I am still able to switch the dial between the other options but it does not do anything.

 

Defrost is usually the fail safe mode. You likely have a stuck mode door actuator.

You can try to disconnect the battery for 10 mins and see if that "resets" the actuators.

Beyond that you'll need to diagnose it.

 

The actuators can be seen by removing the glovebox and floor duct, the duct is a little tricky to get off but pretty easy once you figure it out.


The notch on the actuator shaft should line up with the mark on the actuator body as shown in the picture below.


Recirc door should also be open as shown with the recirc button on.

Closed (Recirc off)


Open (Recirc on)