I HAVE YUKON SLT THAT JUST REPLACED THE MODE ACUTATOR ON AND AIR STILLS BLOWS OUT THE DEFROST VENTS

  • Tiny
  • estivender
  • 2002 GMC Yukon
  • 42,000 miles

When I pluged in the new motor it rotated clockwise and stopped. It will rotate back no matter what the vent selestor is set to.

Friday, November 18th, 2011 AT 5:10 PM

3 Answers

  • Tiny
  • cadieman
  • Expert
  • 3,785 posts

Test the vacuum going to the a/c panel. You have a vacuum leak some thing is leaking. Check all the vacuum hoses.

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Friday, November 18th, 2011 AT 5:27 PM
  • Tiny
  • estivender
  • Member

There are no vacuum lines on this model for a/c, it uses dc servo motors to operate the blend door and the fresh/recirculating vents.

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Friday, November 18th, 2011 AT 5:41 PM
  • Tiny
  • rivermikerat
  • Expert
  • 6,118 posts

Is the dc motor maybe hooked up backwards? That would make the motor turn in reverse.

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Friday, January 27th, 2012 AT 7:32 AM

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