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Why do I have just hot air blowing in the rear air?

Tiny
FIREFIGHTER38242
  • MEMBER
  • 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 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 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
  • 3 POSTS
What is the blend door?
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Tuesday, May 1st, 2012 AT 1:37 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 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
  • 3 POSTS
How do u check it?
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Tuesday, May 1st, 2012 AT 1:41 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 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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