1988 Chevy Blazer Defrost won't blow

1988 CHEVROLET BLAZER
202,000 MILES • V8 • 4WD • AUTOMATIC
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SHAGNOLEUM
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  • 1 POST
Regardless of vent, heat, or defrost, it only blows out the vent. It won't blow out of the top of the dash. Can anyone help? Vacuum line perhaps?
Feb 11, 2009 at 3:29 PM
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MIKE H R
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  • 3,094 POSTS
the heater and defrost is controlled by cables that come from the heater control unit, check the cables to make sure they work properly.
Feb 15, 2009 at 2:01 PM
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