What controls my vents

Tiny
CHRISTENSENJIMMY
  • MEMBER
  • 2000 GMC JIMMY
  • V6
  • 4WD
  • AUTOMATIC
  • 122,000 MILES
My vents only work on the dash vents and defrost vents but not the floor. What controls that when you turn the switch to floor vent?
Saturday, May 11th, 2019 AT 2:24 PM

1 Reply

Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
Hi Christen,

The mode door actuator controls the distribution of the air. Basically, this is an actuator that moves a door inside the HVAC housing that directs the air to whichever vents you chose.

Sounds like this has failed. Unfortunately, they are pretty common. Here is the procedure on how to replace it:

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

Please review this material and let me know if you have any questions.
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Saturday, May 11th, 2019 AT 5:13 PM

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