How to fix Hot Air when A/C is on. Install new air mix/blend door actuator

Discussion in 'Tech Info' started by WHITEOUT, Jun 23, 2010.

  1. Ruth

    Ruth TYF Newbie

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    Would these instructions, location of part, apply to Yukon XL 2001?
     
  2. jose6326

    jose6326 Member

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    has anyone done a write up for the rear hvac system?

    i have no issues with the front heat or ac. all vents work properly
    but when i turn on the rear ac system (controls on the head liner) it only blows hot air
     
  3. JBH1970

    JBH1970 TYF Newbie

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    Sorry to add to an old thread, but I have a problem.

    Chevy Tahoe LT 2000

    AC does not cool period. Not front, back anywhere.

    It blows perfectly. Just warm/cool air. (More on the warm side)

    Defrost works fine.

    Heat works fine. Too well.

    I believe I have a Freon leak. Tried to add and it won't let me. Gauge says full. Almost to full.

    Air blows in all vents, just warm.

    AC compressor turns on. Still warm.

    It will work in the morning on the way to work. When I leave work to come home, it's warm air.

    This morning, it did not work. No cool air that is.

    Any suggestions would be greatly appreciated.

    (Added to a new thread.)

    Thanks.

    JBH
     
  4. Kingx1

    Kingx1 Full Access Member

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    Trying to figure out which part number the actuator is for the blend door. I just replaced the main mode door actuator so that's fixed...not I need to replace the blend door so I get more than just hot air from the passenger side. Anyone have the part number?
     
  5. sean72977

    sean72977 TYF Newbie

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    are there more than 1 acuator for the front on a 2003 yukon xl ?
     
  6. Cattivo

    Cattivo Full Access Member

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  7. moosehead

    moosehead Full Access Member

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    One driver side, one passenger side. I believe

    Sent from my SM-G930V using Tapatalk
     
  8. Maine

    Maine TYF Newbie

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    Just what
    Just the info I need. Thanks
     
  9. xjsc16x

    xjsc16x Member

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    Ditto on the blend door actuator.

    My air was always hot, no matter where the temp setting was. Compressor was turning on, pressure was good and lines were ice cold. I pulled the beauty cover off and then pulled off the actuator with it still plugged in and could see it was barely moving at all between full hot and full cold. Moved the rod for the door myself and was immediately blasted with ice cold air.

    New one's on the way in, $30 and change from Rockauto.

    -Justin
     
  10. xjsc16x

    xjsc16x Member

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    I made a new thread on it, but the new actuator didn't do it for me. Same exact symptoms as the old one. Only moves about half a degree between full hot and full cold. Not sure how to go about testing the signal sent by the controls.

    -Justin
     

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