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beetle

beetle 7/13/2012

1999 GMC Yukon Denali Base 4. Cyl 1.8L

Engine

When a/c blower is on, you can hear it really blowing in the dash, but not much air comes out vents.

1 Answer


CVO

CVO 7/13/2012

The Mode Door Actuator controls the direction of airflow. It selects which way air flows through the different ducts. If your climate control system has lost the ability to control which vents the air comes out of, the MDA has probably failed. Both the ATC and MTC systems use this device.

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CVO

beetle 7/18/2012

Thank you for your help. I appreciate the info.

CVO

CVO 7/18/2012

Thank you for using AutoMD.com

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