Vents not working

DALSCWB1

MEMBER
1 POST
1990 CHEVROLET BLAZER
6 CYL
4WD
AUTOMATIC
140,000 MILES

The air comes out when on floor and defrost just not the vents

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Tuesday, December 29th, 2020 AT 8:58 AM (Merged)

DOCFIXIT

MECHANIC
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.

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Vents not working

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