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.

Car Parts
  1. heater_up_c

    heater_up_c TYF Newbie

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    Did you burp or bleed the air our heater core?

    This is just a helpful tool it is not required. A Radiator Coolant Vacuum Refill Kit sure does help the process. They work like a champ, plus you can also tell if you leaks. It will suck down the hoses flat and put a vacuum on the water cooling system. Then you flip a valve and the vacuum in the system pulls the fluid from a bucket or what have you back into the cooling system.
     
  2. darth_burban

    darth_burban TYF Newbie

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    How do I do that or is there a step by step thing?
     
  3. iLikeEggs

    iLikeEggs Potato!

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    Thanks for sharing this! I h h feeling that I will be tackling this before long. Sometimes in order for my cold air to fully come through I have to turn the temp to high for a few seconds first. Lol.
     
  4. heater_up_c

    heater_up_c TYF Newbie

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    Check out youtube for your vehicle, there are many videos there to check out.
     
  5. heater_up_c

    heater_up_c TYF Newbie

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    May want to check out your temp blend door and/or actuator.
     
  6. vjr021

    vjr021 Full Access Member

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    Quick fix for this: Turn truck off then on three times, it clears the computer and resets the actuator - temp fix, sometimes good for weeks, sometimes days.
     
  7. 04tahoe229

    04tahoe229 TYF Newbie

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    Is the actuator only for hot and cold? My tahoe will only work blowing out of dash vents. I can turn knob for defrost of feet but it doesnt change. Also my drivers side blows harder than passenger side.
     
  8. Jukon

    Jukon TYF Newbie

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    Thanks a LOT for this post. This fixed my AC problem! I knew my compressor was spinning, my low pressure AC line was freezing cold, the blower was on, and yet no cold air. I swapped this out and bam, cold air. Thanks again.
     
  9. metelhead

    metelhead Full Access Member

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    I'm having the same problem, but its the driver's side that blows hot when the passenger blows cold....fresh charge on the AC. I can get ithe drivers side to work temp if I cycle the heat/cold adjustments on each side.

    Where can I find a schematic for the actuators, to find out which one operates which function?
     
  10. Jukon

    Jukon TYF Newbie

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    Watch this:

     

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