Question about 2003 Ford F150 Regular Cab

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Ford F150 AC Problem

My vents on my 2003 Ford F150 will not work on the AC. Cool air still comes out when the AC is set to Floor. AC sounds like air is going somewhere, but will not come out of vents. What could be the problem?

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  • jgriffin55 Jun 20, 2008

    My F150 Lariat Super Cab is having A/C problems. When on Max output the AC blows through the vent as is suppose to. After about 2 min, you can hear the change coming, and air sounds like it is blowing louder but sounds as if it is blowing into the dash and not out the vent.



    Is it a vacuum line?

  • Anonymous Mar 12, 2014

    the rear AC makes a thumping noise when I turn Eng. on Sounds like the pump ?

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  • 1,224 Answers

There is a vent opening linkage for the top vents if you had removed panel for sterio install this linkage might have come loose or the wiren to electric relay to open top vents came loose

also vent doors on front of a/c vents are turned to the closed position

also quite possible the passenger blower motor compartment door in side the blower mode has something blocking entrance

also your truck might be equiped with a blower motor filter i read that these need to be changed out during normal filter replacements the filters for ford i didnt know they started using filters for a/c on reading this since 2000

Posted on May 31, 2008

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These will help.

Thanks.

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