1996 Chevy Astro

TODDYG

MEMBER
1996 CHEVROLET ASTRO
6 CYL
AWD
AUTOMATIC
159,000 MILES

I dont hear any hissing noise to indicate a vacume leak, is there any other reason the ac blows from the defrost vent and not the dash board vents?

Friday, July 23rd, 2010 AT 8:36 AM

1 Reply

JDL

MECHANIC
16,098 POSTS

I agree with you check vacuum, some systems, if vacuum is lost, it will default to defrost. Your directional doors/actuators all work off vacuum. Your hvac controls which actuator gets vacuum.

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