This is a huge problem I have been running into,( is this a northern car) There is a blend door in the HVAC system of the car that switches from cold side to hot side. This door is actuated by a servo motor or vacuum. With your car being newer I would have to say it's a servo motor. This isn't an eassy fix and you might have to take the dash apart. Sometimes the servo motors are accesed right under the dash where the radio compartment is. You have to look under the dash and see if you can see it before you go taking the dash apart.Hope this helps you , Please rate this for me