Vents not working

2002 CHEVROLET BLAZER
178,000 MILES • 4.3L • 6 CYL • 4WD • AUTOMATIC
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DALSCWB1
  • MEMBER
  • 1 POST
the air comes out when on floor and defrost just not the vents
Dec 29, 2020 at 8:58 AM (Merged)
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DOCFIXIT
  • CERTIFIED EXPERT
  • 18,828 POSTS
May have lost vaccum to select switch and it is in default mode. Look for any vac line broken from engine. If none pull out control head verify vac to switch.
Dec 29, 2020 at 8:58 AM (Merged)
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