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You have a vacuum leak. When the a/c controls don't get any vacuum, it defaults to the defrost position. Check and make sure someone didn't accidentally disconnect the vacuum hose with their feet. Look under the dashboard on the passenger side.

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βˆ™ 2004-09-30 12:21:58
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Q: What would cause the heater-ac blower on a 1996 Grand Cherokee to only blow out the window defrost and not at the feet and panel?
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