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repo
repo Posted on Apr 24, 2009
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01 silverado blend door changed /now works back wards!!!

I changed my blend door actuatior on 01 silverado ,works but turn to cold blows hot !turn to hot blows cold!!! pulled fuse tried reset.??????

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  • repo Apr 24, 2009

    no vacuum doors .all elect. tried doing a reset pulled #1hvac fuse turn key on for 1 min .replace fuse , actuator still runs backwards.

  • Anonymous May 11, 2010

    Are there any vacuum doors involved?

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  • Posted on Dec 14, 2011
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In addition to faulty actuator motors, the blend door itself can also be broken. This happened on my Tahoe. Typically it is a very labor intensive and costly fix to replace a broken blend door, as the dash must be removed and the plenum assembly replaced. There is a DIY kit from heatertreater.net that provides steel hardware as well as instructions on how to perform the repair by removing the glove box rather than the entire dash.
This is also an alternative to replacing the 'difficult to access' top actuator motor underneath the dash. The kit contains a single blend door which converts the dual control to single control, and is operated off of the bottom actuator motor, which can be accessed by removing the glovebox. If you are having issues with your blend door, or the 'top blend door actuator motor behind the dash' it is worth looking into.

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  • Posted on Mar 05, 2010
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Were the a/c blend door is located in 2002 chevy silverado

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  • Posted on Jul 24, 2009
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Most likely needs a LH (bottom) temp actuator. Located in the center of the dash on the bottom, you have to remove the hush panel on the rh side of the truck

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Dec 09, 2008 • 2005 Chevrolet Silverado
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Heating system only blows out hot air through the vents
I would look at the air blend doors first, it sound like they are not working or your control in the dash is not working send a signal to them. they work by changing the air from hot to cold or in between.

Avalanche, Sierra And Silverado
  1. Remove the floor air outlet duct extension (1) from the floor duct (2). 0900c152801c9c8a.jpgRemove the floor air outlet duct extension (1) from the floor duct (2)
  2. Disconnect the electrical connection at the blend door actuator (10). 0900c152801c9c8b.jpgBlend door actuator and related components
  3. Remove the blend door actuator mounting screws from the HVAC module.
  4. Remove the blend door actuator as an assembly with the actuator cam. 0900c152801c9c8c.jpgRemove the blend door actuator mounting screws from the HVAC module
To install:
  1. Install the blend door actuator as an assembly with the actuator cam.
    1. Line up the heater/defroster valve lever with the blend door actuator cam slot.
    2. Line up the A/C valve lever with the blend door actuator cam
  2. Install the blend door actuator mounting screw to the HVAC module.
    1. Tighten the blend door actuator mounting screw to 14 inch lbs. (1.6 Nm).
  3. Connect the electrical connection at the blend door actuator (10). 0900c152801c9c8b.jpgBlend door actuator and related components
  4. Install the floor air outlet duct extension (1) to the floor air duct (2).
C/K Series
  1. Disconnect the electrical connector to the mode actuator that is located on the left side of the air distribution case.
  2. Remove the screws.
  3. Remove the adjuster links from the control lever.
  4. Remove the mode actuator.
  5. Adjust the mode actuator by completing the following steps:
    1. Connect the electrical connector to the actuator.
    2. Turn the ignition switch to the RUN position. Allow the self-positioning of the actuator.
    3. Turn the ignition switch to the OFF position.
    4. Remove the actuator from the electrical connection. 0900c152801c9c8d.jpgBlend door actuator-C/K Series
To install:
  1. Install the mode actuator.
  2. Install the screws.
  3. Install the adjuster links to the control lever.
  4. Connect the electrical connector.
  5. Test the circuit operation
Read full answer
Nov 27, 2008 • 2001 Chevrolet Silverado
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