After replacing the blend door, the A/C controls do not turn off the front vents?

Tiny
SSHAFFER92
  • MEMBER
  • 2020 RAM 1500
  • 5.7L
  • V8
  • 2WD
  • AUTOMATIC
  • 90,000 MILES
Since I replaced the driver side blend door my A/C controls will not switch off the front vents. There is also nothing coming out of the rear vents. Any suggestions?
Friday, December 6th, 2024 AT 10:27 AM

21 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 50,520 POSTS
It sounds like the orientation of the blend door drive is not timed correctly or the actuator is defective. Also, it says to Initiate the Actuator Calibration function using a scan tool, did you do this? Check out the images (below). Please let us know what happens.
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Friday, December 6th, 2024 AT 10:59 AM
Tiny
SSHAFFER92
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Sorry for the delay, I was just able to test the actuators. The scan tool showed everything functioning properly.
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Thursday, December 19th, 2024 AT 7:24 AM
Tiny
KEN L
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Okay, let's remove the actuator and work the blend door pivot by hand when the system is on low to see if you can actuate the door by hand. This guide will show you what I am talking about:

https://www.2carpros.com/articles/replace-blend-door-motor

Please go over this guide and get back to us.
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Thursday, December 19th, 2024 AT 11:08 AM
Tiny
SSHAFFER92
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Do I need to remove all the actuators or a specific one?
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Thursday, December 19th, 2024 AT 11:20 AM
Tiny
KEN L
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Just the one you replaced, did the system work okay before you replaced the actuator?
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Friday, December 20th, 2024 AT 9:20 AM
Tiny
SSHAFFER92
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It was still acting up on occasion not switching vents. I did this before I replaced the actuator, I was able to move the door and change the temperature. The actuator I replaced was for the heat control on the driver side.
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Friday, December 20th, 2024 AT 9:34 AM
Tiny
KEN L
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Okay, then I would go back to moving the driver's side actuator pivot by hand to see if that fixed the problem.
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Saturday, December 21st, 2024 AT 10:06 AM
Tiny
SSHAFFER92
  • MEMBER
  • 22 POSTS
I tried doing it by hand but that only controlled the heat function on the driver's side.
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Monday, December 23rd, 2024 AT 5:48 AM
Tiny
KEN L
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Okay so that works, does the drivers side work okay with the actuator connected? It might be you have a mode actuator that is not working. Lets try the same process for this actuator to see if things change.
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Monday, December 23rd, 2024 AT 1:12 PM
Tiny
SSHAFFER92
  • MEMBER
  • 22 POSTS
I have the center console removed but not seeing the actuator. Can you give more clarity to where it is?
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Tuesday, December 24th, 2024 AT 6:22 AM
Tiny
KEN L
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Sure, it looks like it is down low in the middle of the heater plenum. Check out the images (below). Let us know how it goes.
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Tuesday, December 24th, 2024 AT 11:11 AM
Tiny
SSHAFFER92
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I am still not seeing it. Is it on the front side?
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Tuesday, December 24th, 2024 AT 11:15 AM
Tiny
KEN L
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It might be under the plenum. Can you upload some images of what you are seeing?
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Wednesday, December 25th, 2024 AT 10:20 AM
Tiny
SSHAFFER92
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  • 22 POSTS
This is behind the center console and radio.
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Thursday, December 26th, 2024 AT 6:36 AM
Tiny
KEN L
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Hmm, I don't see it either, does this truck have dual zone climate controls? It might be further under the HVAC plenum, this is all they show for the location.
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Thursday, December 26th, 2024 AT 12:01 PM
Tiny
SSHAFFER92
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I found the mode door actuator it was the one by the steering column. I realized it was working properly, but the gear plate it is on is out of alignment. Do you have an image of it in alignment?
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Friday, January 3rd, 2025 AT 5:43 AM
Tiny
KEN L
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Nice work, I found it as well, it is called the mode actuator 2. I don't see the gear you are talking about though. This shows all of the actuators.
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Friday, January 3rd, 2025 AT 11:55 AM
Tiny
SSHAFFER92
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Right behind the actuator it has a cover then instead is a plate with slots in it that align to move the doors. I can’t get the alignment right for some reason.
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Friday, January 3rd, 2025 AT 12:14 PM
Tiny
KEN L
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So this is strange, they don't show anything like that, can you give me your VIN so I can look it up that way?
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Saturday, January 4th, 2025 AT 11:09 AM
Tiny
SSHAFFER92
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The VIN is 1C6RREFT8LN398293.
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Sunday, January 5th, 2025 AT 6:47 AM

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