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 5 of 5
  1. #1

    Default A/C Blower Stuck In Defrost....Help???

    i have a 2004 Chevy Silverado xtra cab 2wd 5.3 with the dual climate control and i have full fan up to setting 5 but its stuck or something blowing though the windshield defrost vent and cant get it though the dash or floor please help with any advice or where to turn thanks.....

  2. #2
    Legend

    Join Date
    Feb 2008
    Location
    Red Wing, Minnesota, United States
    Posts
    3,390

    Default

    your blend doors arent working if it wont turn from defrost to vents
    99 K1500 Suburban LT "THE BEAST"
    Hypertech III, K&N, true dual
    285/75/16
    ___________________________
    Jason

  3. #3

    Default

    Quote Originally Posted by vncj96 View Post
    your blend doors arent working if it wont turn from defrost to vents
    where do i find them to check it out and to fix this problem thank you

  4. #4

    Default

    their are several blend doors. you'll have to take our the hvac box to get to all of them. some you can see by sticking your head under the dash. watch the top of the actuators while switching the settings so you can see the square hole move. if not you can stick a 1/4" ratchet in there and manualy turn the door

    disconnect your battery and let the truck sit for a few min. had alot of those concerns in wich re-setting the computer fixd it. alot of times the actuators will "loose" the door positions

    test for signal and pwr at the actuator before replacing it to make sure your control head isnt bad
    Last edited by Loggerhead Mike; 05-05-2010 at 12:06 PM.
    GM TECH

    05 silverado shortbed

  5. #5

    Default

    Quote Originally Posted by Loggerhead Mike View Post
    their are several blend doors. you'll have to take our the hvac box to get to all of them. some you can see by sticking your head under the dash. watch the top of the actuators while switching the settings so you can see the square hole move. if not you can stick a 1/4" ratchet in there and manualy turn the door

    disconnect your battery and let the truck sit for a few min. had alot of those concerns in wich re-setting the computer fixd it. alot of times the actuators will "loose" the door positions

    test for signal and pwr at the actuator before replacing it to make sure your control head isnt bad

    i did the battery trick and it cycles though all the vents one at a time full boar, the its goes to the dash vents and sits for about 10 sec....then goes back to the window defrost vent, so would that mean my control is shot because every thing works on it the fan speed and hot or cold, all except the position knob......

Similar Threads

  1. defrost problems..help?
    By Silverado1500 in forum Chevy Silverado Forum (GMC Sierra)
    Replies: 0
    Last: 12-17-2009, 03:57 PM
  2. Defrost CFM
    By Six point in forum General Chevy & GM Tech Questions
    Replies: 2
    Last: 10-20-2009, 10:19 PM
  3. Can you add rear defrost?
    By Tdaz250 in forum Audio, Video & Gadget Tech
    Replies: 19
    Last: 09-29-2009, 02:42 PM
  4. 03 silverado goes to defrost
    By danduf98 in forum Audio, Video & Gadget Tech
    Replies: 0
    Last: 08-07-2008, 12:52 PM
  5. Help no heat only defrost
    By challutz in forum Chevy Suburban Forum (GMC Yukon XL)
    Replies: 0
    Last: 02-12-2007, 04:36 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
  •