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2002 Chevrolet Silverado Air Conditioning select dial

Tiny
PATRICKTHOM
  • MEMBER
  • 2002 CHEVROLET SILVERADO
  • 4.8L
  • V8
  • 2WD
  • AUTOMATIC
  • 136,000 MILES
A/C fan turns on, however the air does not make it to the vent. I think the dial selector has failed. When I made a change to selector dial, like heat their was a odd sound. Now the sound is gone and the vent is blocked when I want A/C.
Saturday, November 14th, 2015 AT 4:30 PM

3 Replies

Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
Is the air coming out of a different vent like the windshield or foot vents?

Has the blower motor or any of it's wiring been replaced recently?
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Sunday, November 15th, 2015 AT 5:48 AM
Tiny
PATRICKTHOM
  • MEMBER
  • 1 POST
Q Is the air coming out of a different vent like the windshield or foot vents?
A Yes the windshield defrost vents

Q Has the blower motor or any of it's wiring been replaced recently?
A No
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Sunday, November 15th, 2015 AT 1:10 PM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
The mode doors are operated by an electric actuator mounted on the left side of the HVAC box. The actuator could be bad or the mechanism or air door could be jammed. It will have to be inspected to find out.
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Sunday, November 15th, 2015 AT 1:14 PM

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