I am having the same issue with my 08 Caliber. I turn it to defrost and it snaps back 2 clicks. I can only use head feet combo or just feet. I removed the glove box and it doesn't appear that the black hosing is in the way at all. I can feel that the cable is still connected to the white plastic piece and it still moves when I turn the dial. I'm thinking I may need to removed the front of the dash where the control dials are located. Im not sure what else it could be.