Heater not blowing out of floor vents?

Tiny
BENGALYORK
  • MEMBER
  • 2019 CHEVROLET EXPRESS
  • 6.0L
  • V8
  • 2WD
  • AUTOMATIC
  • 172,000 MILES
My van listed above will not blow heat out of the floor setting. I can change it to air, and it blows out the floor fine. The heat will come out anywhere else I want it to besides floor. Any Help is appreciated. Thank you!
Monday, February 24th, 2025 AT 1:52 PM

3 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 50,271 POSTS
This must be a bad air temperature blend door actuator, or the control module is bad. Most of the time it will be the actuator, here is the location so you can swap it out which should fix the problem. You can try resetting the system which sometimes works as well.

This guide will show you:

https://www.2carpros.com/articles/step-by-step-guide-to-reset-your-cars-hvac-system-an-essential-for-every

You might want to try a CAN scan which may have codes that will help us. You can get a CAN scanner (Controller Area Network) which will work on most cars from Amazon.

Here is a video to show you how:

https://youtu.be/u-4syLc-ifQ

Check out the images (below). Please let us know what happens.

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Monday, February 24th, 2025 AT 5:53 PM
Tiny
BENGALYORK
  • MEMBER
  • 10 POSTS
Will do, thanks sir. I have a new GM blend door actuator on the way, I’ll let you know what happens when it arrives. Thank you. I sent a little donation to help along the way.
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Tuesday, February 25th, 2025 AT 2:16 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 50,271 POSTS
Thank you very much for the consideration ;) That should fix it, let me know how to goes.
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Tuesday, February 25th, 2025 AT 9:48 AM

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