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Chevy Blazer

Your heater in your 93 blazer does not work right fan runs but not much air comes out the vents changed the duct work doors seem to be working but dont blow air what can you do?

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Wiki User
November 03, 2007 2:53AM

If it has the vacumm operated climate control check for a vacumm leak under the dash. Also check for proper operation of the vacumm valves operating the doors. Usually if the system breaks the control will default to the defrost position and vacumm leaks are a common cause.