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Ac Vent actuator not working

Discussion in 'Ask An Owner Operator' started by Varinderkahlon, Oct 20, 2021.

  1. Oct 20, 2021 #1
    Varinderkahlon

    Varinderkahlon Bobtail Member

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    Apr 7, 2021
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    Hello, I have 2016 Peterbilt 579. My truck is suddenly just blowing air from the front vents. The windshield or floor vents are not blowing air at all. I believe the problem is with the vent actuator that controls the air flow, but I don’t know where it’s located on the truck. If anyone knows, plz help me. Pictures would be great.
     
    Varinderkahlon, Oct 20, 2021
    Varinderkahlon, Oct 20, 2021
    #1 + Quote Reply
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  3. Oct 20, 2021 #2
    Spyro2112

    Spyro2112 Medium Load Member

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    By the blower fan
     
    Spyro2112, Oct 20, 2021
    Spyro2112, Oct 20, 2021
    #2 + Quote Reply
  4. Oct 20, 2021 #3
    Spyro2112

    Spyro2112 Medium Load Member

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    Passenger side under. Fuse box
     
    Spyro2112, Oct 20, 2021
    Spyro2112, Oct 20, 2021
    #3 + Quote Reply
  5. Oct 20, 2021 #4
    Spyro2112

    Spyro2112 Medium Load Member

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    Left side
     
    Spyro2112, Oct 20, 2021
    Spyro2112, Oct 20, 2021
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  7. Oct 20, 2021 #5
    Varinderkahlon

    Varinderkahlon Bobtail Member

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    Apr 7, 2021
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    I found then. There are two. One is right at front that one is ok. But can’t reach the one on the left side of the fan. That may be defective. Not sure which of them serves which perpose
     
    Varinderkahlon, Oct 20, 2021
    Varinderkahlon, Oct 20, 2021
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  8. Oct 20, 2021 #6
    Varinderkahlon

    Varinderkahlon Bobtail Member

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    Apr 7, 2021
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    I found the problem. Actuator is working but the air door pivot which is rotated by the actuator is stuck. Anyone knows how to free it ????
     
    Varinderkahlon, Oct 20, 2021
    Varinderkahlon, Oct 20, 2021
    #6 + Quote Reply
  9. Oct 20, 2021 #7
    JonJon78

    JonJon78 Road Train Member

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    Sounds like the blend door is stuck? The entire Hvac United needs to be removed.
     
    JonJon78, Oct 20, 2021
    JonJon78, Oct 20, 2021
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  10. Oct 20, 2021 #8
    Varinderkahlon

    Varinderkahlon Bobtail Member

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    Apr 7, 2021
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    Do I have to replace it or can it be fixed. And how much would it cost to fix or to replace?
     
    Varinderkahlon, Oct 20, 2021
    Varinderkahlon, Oct 20, 2021
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  11. Oct 20, 2021 #9
    JonJon78

    JonJon78 Road Train Member

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    The blend doors and actuators can be replaced. The entire HVAC unit probably needs a good cleaning on a 2016 I doubt that its been apart before.

    I don't recall how much I paid for a similar problem, its been awhile...

    Maybe @Goodysnap can give you a ball park price range....
     
    JonJon78, Oct 20, 2021
    JonJon78, Oct 20, 2021
    #9 + Quote Reply
  12. Oct 21, 2021 #10
    Varinderkahlon

    Varinderkahlon Bobtail Member

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    Apr 7, 2021
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    Thank you brother!
     
    Varinderkahlon, Oct 21, 2021
    Varinderkahlon, Oct 21, 2021
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