WHY DO I HAVE JUST HOT AIR BLOWING IN THE REAR AIR?

  • Tiny
  • firefighter38242
  • 2003 Chevrolet Tahoe
  • 175,000 miles

The truck only blows hot air when ac is blowing cold air up front.

Tuesday, May 1st, 2012 AT 1:26 AM

5 Answers

  • Tiny
  • ASEMaster6371
  • Expert
  • 25,502 posts

Either low in freon or you have a blend door issue with the rear air.

Roy

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Tuesday, May 1st, 2012 AT 1:27 AM
  • Tiny
  • firefighter38242
  • Member

What is the blend door?

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Tuesday, May 1st, 2012 AT 1:37 AM
  • Tiny
  • ASEMaster6371
  • Expert
  • 25,502 posts

A motor that moves a door that allows either heat or ac to come out the vents.

Roy

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Tuesday, May 1st, 2012 AT 1:38 AM
  • Tiny
  • firefighter38242
  • Member

How do u check it?

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Tuesday, May 1st, 2012 AT 1:41 AM
  • Tiny
  • ASEMaster6371
  • Expert
  • 25,502 posts

You cannot. A shop with a scan tool can manipulate it to confirm it working. Let a shop at least check it for you so you do not waste any money on parts that dont fix it.

Roy

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Tuesday, May 1st, 2012 AT 1:42 AM

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