Heat or A/C air flow is stuck coming out of the floor vents and I cannot change it

2015 VOLKSWAGEN PASSAT
85,000 MILES • 1.8L • 4 CYL • TURBO • 2WD • AUTOMATIC
Avatar
JAMES LATIMER
  • MEMBER
  • 1 POST
Car listed above is an S model. The heat and A/C themselves work just fine. The issue I'm having is that I can't change where they are coming from. It's all stuck on floor.

When turning the knob there's no feedback, no sounds, nothing.

Any ideas?
Jun 8, 2022 at 12:50 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.
Advertisement
Avatar
SQM
  • CAR REPAIR CONTRIBUTOR
  • 6,383 POSTS
Hello,

It sounds like the issue is a stuck mode door actuator. The mode actuator is what controls the air flow from different positions. It can fail and get stuck in one.

The mode door actuator is located behind the dash in the HVAC box.

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

I have attached a diagram below for your reference.

Let me know of any questions.
Thank you.
Images (Click to enlarge)
Attached Media
Attached Media
Jun 8, 2022 at 2:40 PM
Advertisement