A/C problem

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May 21, 2013 | 08:36 PM

Brentwood Sooner

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A/C problem

I have a 2001 F150 with 5.4 and when I punch it with the AC on it goes to the defrost then comes back to the front vents. Has anyone ever had this problem?

May 21, 2013 | 09:30 PM

RLXXI

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From: Big Easy

Quote:

Originally Posted by Brentwood Sooner

I have a 2001 F150 with 5.4 and when I punch it with the AC on it goes to the defrost then comes back to the front vents. Has anyone ever had this problem?

You have a vacuum leak. Check the hard black plastic lines that run behind the battery, most times battery acid will over time eat away at them.