There are a few potential reasons why your car vents may have stopped blowing air out of the dashboard vents, and instead, it's coming out of the vents by the windshield (defrost vents). Please note that without physically inspecting the vehicle, it's challenging to pinpoint the exact cause, but here are some common possibilities:
Vent control issue: Your vehicle's climate control system uses a series of doors or flaps to direct the airflow to different vents. If one of these doors becomes stuck or malfunctions, it can result in air being diverted only to the defrost vents. This is a common issue in some vehicles, and it could be due to a faulty actuator or blend door motor.
Vacuum system problem: Many older cars use vacuum-operated actuators to control the vent system. If there's a vacuum leak or a problem with the vacuum lines, it can lead to incorrect vent settings or an inability to direct the air to the dashboard vents.
Electrical issue: Some modern cars use electronic actuators and motors to control the vent system. If there's an electrical problem or a faulty control module, the vents may not respond correctly to your input.
Blocked or clogged vents: It's possible that something is obstructing the ducts leading to the dashboard vents, causing the air to be forced out of the defrost vents instead.
To diagnose and fix the issue, you'll likely need to take your 2014 Cadillac SRX to a qualified mechanic or dealership. They will have the necessary tools and expertise to inspect the climate control system, check for error codes, and conduct tests to identify the specific problem.
As always, it's essential to address any issues with your vehicle's ventilation system promptly, as it can impact your driving comfort and visibility, especially in certain weather conditions.