A/C ONLY BLOWS THROUGH DEFROST

  • Tiny
  • my2007sierra
  • 2007 GMC Sierra
  • 55,000 miles

My A/C only blows through defrost vents. Upon initial startup itll blow from regular vents but after about a minute or two itll only blow through defrost, no matter what setting it is on. At first it would only blow cold from drivers side and warm on passenger side, but after a while it only blows cold through defrost vents.

Friday, June 22nd, 2012 AT 8:30 PM

1 Answer

  • Tiny
  • rasmataz
  • Member

Have the mode actuator and the HVAC control module checked/tested

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Friday, June 22nd, 2012 AT 8:47 PM

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