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Hello! I just became the owner to a 2017 Chevy Trax LS in January. It’s been a great car, but recently my defroster hasn’t been working. When I turn the dial to defrost, it blows air out of all the vents.
Does anyone know the solution to this problem? Thank you in advance!
 

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Does it feel like you are moving something when you turn the dial or does it turn freely? In the winter a lot of people turn the dials right away when they start their vehicle, this is not a good practice since sometimes the trap doors are frozen to the seals. Always best to let warm air flow through the system before attempting any changes. Often on these 1 of 2 things will happen if frozen, the nylon string moving these doors will jump the rail or will snap. You will end up needing to replace part #21









 
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