Air only blowing on defrost

2004 CADILLAC CTS

2,120,000 MILES • 3.6L • V6 • AUTOMATIC

AROWLAND98

MEMBER
2 POSTS

Okay, it only blows on defrost nothing else not even though the front vents or bottom where my feet are at. I don’t know were to start or have to fix it.

Jul 22, 2019 at 9:24 PM

SCGRANTURISMO

✓ASE Certified Mechanic
4,897 POSTS

Hello,

This could be a problem with vehicle's Mode Actuator. This is the actuator that controls where the air is going to and when it breaks, through normal wear and tear, the vent position it is in when it breaks is going to be the only vent position that will be working. In the diagrams down below I have included the step by step directions for the removal and installation of the actuator as well as a diagram of the Heating Ventilation and Air Conditioning (HVAC) system for your vehicle. Also here is a link for you to go to below:

https://www.2carpros.com/articles/air-vents-stay-in-the-defrost-position

Please go through these guides and get back to us with what you are able to find out.

Thanks,
Alex
2CarPros

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Jul 23, 2019 at 4:09 AM