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#1
10-08-2007, 12:52 PM
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Blend Door Inquiry
I have a 1996 Chevy Astro. I cannot get the blend door to move.
 In fact, I cannot even locate the blend door. If and when I find the door, can I adjust it manually? Also, is the actuator vacuum operated or electric?Much Thanks, FB 
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#2
10-08-2007, 05:18 PM
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Re: Blend Door Inquiry
The HVAC doors are vacuum operated. Most likely cause is a broken vacuum line from the fitting on the driver side rocker arm cover to the HVAC connections near the accumulator and evaporator. The 1/8" black plastic line dries out, cracks and breaks. When the HVAC system loses vacuum, it defaults to the defrost position. Cut out the bad plastic tubing and use a length of 1/8" ID rubber vacuum line for the repair. No clamps are necessary as the new line will fit tightly over the existing plastic line.
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