Mechanics

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

2003 Chevrolet Tahoe • 175,000 miles

The truck only blows hot air when ac is blowing cold air up front.
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Firefighter38242
May 1, 2012.




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

Roy
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What is the blend door?

Tiny
Firefighter38242
May 1, 2012.
A motor that moves a door that allows either heat or ac to come out the vents.

Roy

How do u check it?

Tiny
Firefighter38242
May 1, 2012.
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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