Question about 2005 Ford F 350 Super Duty

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2005 f350. Heater works but can't get air to flow out of leg vents....even when specifying leg vents on instrument panel.

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  • deaddux Mar 02, 2009

    Blower works fine. Defrost vents work as do panel vents. When the leg vent selection is made (or the leg/panel combo selection) the air blows out the defrost vents only. When the panel vent selection is made air blows out the panel vents. I figure there is a "damper" of some sort that is not activating properly....but hey, I build houses not trucks.

  • Chuck Martin
    Chuck Martin May 11, 2010

    where is the air coming out out?

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  • Ford Master
  • 783 Answers

If air is coming thru defroster then you have a vacuum leak.Defrost is the default postion(no vacuum).Look under hood on the passenger side next to heater core area and see if you can find the small black vacuum line going thru the firewall.Trace it back to the vacuum canister on right side of engine or fender well and make sure nothing is disconnected or leaks in the line and trace it from canister back to the source also.

Posted on Mar 03, 2009

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