GM Truck Club
THE PREMIER CHEVY TRUCK & SUV FORUM
Founded in 2004 ~ We're the #1 Chevy Truck & SUV Forum.
Silverado & Sierra | Tahoe & Yukon | Suburban & Yukon XL | SUV & CROSSOVER
Results 1 to 10 of 14

Hybrid View

  1. #1
    Newbie
    Join Date
    Dec 2005
    Location
    Spring Branch, Texas
    Posts
    7

    Default 2004 Suburban AC starts Blowing hot air out driver vents

    I got a 2004 Suburban that sometimes blows hot air out of the driver vents, while the rest of the vents blows cold air. If I turn the Suburban off for a couple of minutes then turn it back on, all the vents blow cold air. It was happening once in awhile, but lately it is happening almost daily. Does anyone know what is wrong and how to fix it.

  2. #2

    Default

    I dont really know for sure, but im assuming your vents are turned on and off eletronicaly and there could be a problem in the control unit where you change the direction of air. If you cycle through the different vents does it change or make a difference?
    1995 C1500 4.3L 2WD. JET TBI Spacer, JET stage 1 chip, 10mm Taylor custom wires, Pulstar Iridium Pulse Plugs.
    260k miles and still going strong...

  3. #3

    Default

    Does your truck have driver passenger seperate vent controls?

  4. #4
    Newbie
    Join Date
    Dec 2005
    Location
    Spring Branch, Texas
    Posts
    7

    Default

    It only does it on the driver one by the window and the one above the radio, the two on the passenger side and the back ones still blow cold air. My brother said there is a relay in the dash that is going bad.

  5. #5

    Default

    Sounds like left temp actuator. Mine is doing same thing (04 silverado).

    I found a post here while searching about resetting the actuator. Give this a go:

    - With car off, pull the 10A HVAC fuse (located in fuse box on driver side panel with door opened)
    Check fuse just because you have it out already, but should be ok.
    - Turn key to accessory
    - Let it sit there for a min or two.
    - Turn key off
    - Plug 10A fuse back in.

    Another one I found was about cleaning the actuator. Located under driver dash about the gas pedal.
    Just note how the part/pieces go together when taking it apart to clean.

    I just posted up to ask if there's a way to rewire the right to the left side, so it can bypass the "bad" right temp actuator. Controls would be used only on the left of course. I would think this is doable but not sure.

    -D
    2004 Silverado LS 2wd - std cab - long bed
    2006 Lexus IS 250 AWD

  6. #6

    Default I've had the same problem for years - turn the key off and it resets

    Quote Originally Posted by bucd View Post
    Sounds like left temp actuator. Mine is doing same thing (04 silverado).

    I found a post here while searching about resetting the actuator. Give this a go:

    - With car off, pull the 10A HVAC fuse (located in fuse box on driver side panel with door opened)
    Check fuse just because you have it out already, but should be ok.
    - Turn key to accessory
    - Let it sit there for a min or two.
    - Turn key off
    - Plug 10A fuse back in.

    Another one I found was about cleaning the actuator. Located under driver dash about the gas pedal.
    Just note how the part/pieces go together when taking it apart to clean.

    I just posted up to ask if there's a way to rewire the right to the left side, so it can bypass the "bad" right temp actuator. Controls would be used only on the left of course. I would think this is doable but not sure.

    -D
    Heck, I've learned how to reset it doing 65 on the freeway (a necessity in the South), but I'm hopeful this fix will work. Can't wait - I've searched this forum since the issue first appeared - my wife has the car right now, but should be home in a few minutes!

    Thanks,
    Bill

    (next day)

    I tried the reset suggested and then took the subn to a local store. While idling there, the driver-side a/c switched to heat while the passenger side stayed comfortably cold. Consequently, I reset the system AGAIN when I returned home and - so far today - the a/c hasn't switched to heat. I did allow for a little more time (around 4 minutes vs. about 2-1/2 the first time). I'll report in a few days whether this has appeared to taken care of the problem.
    Last edited by wbmartin3; 06-30-2011 at 08:58 PM. Reason: Results of suggest fix

  7. #7
    Jr. Mechanic Sandhopper's Avatar
    Join Date
    Feb 2010
    Location
    Amarillo, Texas, United States
    Posts
    120

    Default

    X2 sounds like the temp actuator... My 04 Silverado used to do the same thing... Would drop it in "N" turn off the ignition and then restart... Worked almost every time. I do not suggest you try this in traffic... Ya might want to pull over first.

    2010 Suburban Z71 5.3 A6, Sheer Silver, Ebony Interior

    2004 Lexus RX330 AWD - Netune Blue Metalic

Similar Threads

  1. 07 tahoe heat blowing out of the driver side vent with ac on
    By adamant in forum Chevy Tahoe Forum (GMC Yukon, Cadillac Escalade)
    Replies: 10
    Last: 09-15-2012, 05:29 AM
  2. 2004 Tahoe keeps blowing left turn fuse
    By coppcarz in forum Chevy Tahoe Forum (GMC Yukon, Cadillac Escalade)
    Replies: 23
    Last: 12-13-2010, 08:05 AM
  3. chevy silverado dash vents dash part ac heat vents
    By ChevyFan in forum Chevy Parts eBay
    Replies: 0
    Last: 10-15-2009, 06:00 PM
  4. heater/vents not working, only blowing to floor
    By thattallguy32 in forum General Chevy & GM Tech Questions
    Replies: 2
    Last: 10-12-2009, 12:50 AM
  5. '90 Suburban a/c air vents & switch question..?
    By omnisi in forum General Chevy & GM Tech Questions
    Replies: 5
    Last: 05-17-2009, 05:07 PM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •