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A/C doesn't come out of top vents

Tiny
SPIDERGOAT
  • MEMBER
  • 2004 CHEVROLET TAHOE
  • 150,000 MILES
AC works on bottom and defrost only, can't get it to come out the top vents. This is the front cabin only, the rear is fine. I believe it is a servo I just don't know where it is located. Or maybe an actuator. Please let me know where I can see a diagram of where it is. Also where can I get the parts necessary to fix it
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Saturday, August 24th, 2013 AT 1:38 PM

1 Reply

Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
The mode door actuator is mounted on the left end of the HVAC case. You can see it from under the dash on the drivers side. Watch it while switching the mode and see if anything is broken or jammed.
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Wednesday, December 4th, 2019 AT 8:29 PM

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