99.9% of the time it's the blend door actuator, Hyundai does give this info on their location! Remove the trim panel by prying it off, it just pops into clips, then unbolt the unit. Then you might need to remove the glove box door and some minor bracing.
Here is a guide to help you fix the problem. Then see the diagrams and images below with all for the blend mode door actuator locations
Please let us know what you find so it will help others.
Images (Click to enlarge)
Thursday, December 29th, 2016 AT 5:49 PM