air vents not changing?

2018 CHEVROLET TRAX
90,000 MILES • 1.8L • 4 CYL • 2WD • AUTOMATIC
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JEFF GILL
  • MEMBER
  • 1 POST
air doesn't change to heater, defroster vents, stuck on floor vent. Vents don't change from defrost to floor vents.
Feb 2, 2023 at 4:06 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
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STRAILER
  • CAR REPAIR CONTRIBUTOR
  • 54,189 POSTS
Yep, this happens when the mode actuator goes out. here is the location so you can change it out to fix the problem. You will need to recalibrate the parts once installed.

Alternate Method (without Scan Tool)

Note: Do not operate any HVAC controls while the HVAC control module is calibrating as this may interrupt the process. If interrupted, improper HVAC performance will result.

Ignition OFF Vehicle OFF
Remove the HVAC control module fuse for a minimum of 10s
Install the HVAC control module fuse
Start the vehicle
Wait 40s for the HVAC control module to self-calibrate

Check out the images (below). Please let us know if you need anything else to get the problem fixed.
Feb 3, 2023 at 11:27 AM
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