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99 Chevy S10 Heat/AC Blower Not Working

My 99 S10 v6 heater/ac blower works well except the fan doesn't blow air/heat on the floor setting or the combination floor/vents. When I put the selector on floor setting, I can hear the "door" directing it to the floor open/close, and the fan running, but nothing is coming out of the floor vents. Also the blower doesn't work on the #1 setting no matter what vent setting. Position 2 - 4 works on all except the floor.

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By Jerry c

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August 21, 20160 found this helpful

Check the vaccume hose that activates the vent door for leaks
I have an 07 Chevy van and that was my problem
Only had defroster venting until I replaced the vaccume hose between the intake manifold and vaccume ball
Now all works well again

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Anonymous
November 10, 20160 found this helpful

Heater core

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