Why does a/c blow out of defrost? on 2003 Ford F-150

A/C will only blow out of defrost. The air will not blow out of vents.

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2 answers
Go to this web site and following the instructions. Its simple and it fixes the problem. Cost very little. I did it and it did fix the same problem your having.


http://www.fordf150.net/forums/viewtopic.php?t=72104
You have a vacuum leak somewhere in the dash. Check all vacuum hoses under the dash to make sure they are connected.