Question about 2003 Ford F150 Regular Cab

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2003 ford f150 air conditioner only blows out defrost vents

Posted by Anonymous on

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6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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chuck943
  • 783 Answers

SOURCE: Vent control

You have a vacuum leak.Defrost is the default postion(no vacuum).
See if you can locate the small black vacuum line that goes inside the vehicle on the passenger side near the heater core. The trace it back,should see it going to a canister then to the intake manifold.Make sure it is not disconnected or broken somewhere.

Posted on Mar 02, 2009

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chuck943
  • 783 Answers

SOURCE: Ford F150 2003 When I press the max cool on the AC the air comes out of the windshield defrost vent iinstead of the cabin vents and is not as cold as it use to be. Summer in Texas Help !

You did not mention if the system you have is electronic(digital control) or manual(control knobs) but what your problem is, is a vacuum leak. Defrost and heat or the default postions for no vacuum. If it works ok until you press max air Then you will need to check the outside blend door vacuum motor. It will be the white vacuum line going from the control head.
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Posted on Jun 01, 2009

harley9701ha
  • 424 Answers

SOURCE: ac on 2003 f150 supercrew blows air out defroster when on max

Check for vacuum leak going to air inlet door. Should be a white vacuum hose.

Posted on Jun 22, 2009

harley9701ha
  • 424 Answers

SOURCE: climate control is on defrost only the auto

Check your vacuum pump located on the right side fenderwell. see if its running. Check the vacuum hose at the hubs for leaks or damage. repair if damaged. check for other vacuum leaks such as the grey hose going to the heater control valve.

Posted on Oct 05, 2009

duane_wong
  • 6826 Answers

SOURCE: My 2003 Ford Expedition a/c blows out the defrost

The vacuum motor is not operating right due to a loose vacuum tube, ore electrical connection or the logic is bad in the climate control electronics. The vacuum motor controls the door angle which controls whether the a/c blows out of the front vents or the defrost vents.

Posted on Jul 21, 2010

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1 Answer

I have a 2003 Ford F-150 FX4 5.4 and the AC only blows out of the defrost and help


Dustin, Sound like vacuum loss to position switch. Defrost is the default position when vacuum is lost in vent control system. Check any and all vacuum lines and connections under hood first, especially any that run through firewall. Check the attached links,instruction and guides, Good luck
"I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."
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Apr 13, 2016 | Ford Cars & Trucks

1 Answer

No heat from vents


As per your problem mentioned. There are few solved help links to troubleshoot these problems. Go through the list and Click the link below:----

2000 Toyota Avalon: No heat on Passenger Side?

http://whatisbyme.blogspot.in/2012/05/2000-toyota-avalon-no-heat-on-passenger.html

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No heat on Oldsmobile Silhouette?


http://technoanswers.blogspot.in/2012/02/no-heat-on-oldsmobile-silhouette.html

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Heater blows cold?

http://schematicsdiagram.blogspot.in/2012/02/heater-blows-cold.html

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Heat blows cold on drivers side and hot on passenger side?

http://schematicsdiagram.blogspot.com/2011/12/heat-blows-cold-on-drivers-side-and-hot.html

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Hot air on the driver's side vents only?

http://repairhelpcenter.blogspot.com/2012/01/hot-air-on-drivers-side-vents-only.html

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Temperature gauge does not move and no heat when heater is ON?

http://technoanswers.blogspot.com/2012/01/temperature-gauge-does-not-move-and-no.html

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1992 Toyota Camry: A/C Control light Flashing and A/C not Blowing Cold?

http://technoanswers.blogspot.in/2012/04/1992-toyota-camry-ac-control-light.html

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No heat, blower blows only cold?

http://technoanswers.blogspot.in/2012/02/no-heatblower-blows-only-cold.html
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Ford F150 Ac only blows through defrost vents?

http://technoanswers.blogspot.com/2012/01/forf-f150-ac-only-blows-through-defrost.html

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Dodge A/C come out of defrost vents only?

http://technoanswers.blogspot.com/2012/01/dodge-ac-come-out-of-defrost-vents-only.html

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Ac vacuum line on dodge cummins?

http://technoanswers.blogspot.com/2012/01/ac-vacuum-line-on-dodge-cummins.html

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Ford ranger AC blows cold through defrost vents instead on cabin vents?

http://technoanswers.blogspot.com/2012/01/ford-ranger-ac-blows-cold-through.html

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2005 Chrysler PT Cruiser: A/C Blows Warm?

http://whoisbyme.blogspot.in/2012/06/2005-chrysler-p8t-cruiser-ac-blows-warm.html


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2009 Mercury Grand Marquis: A/C blows Cold From Defrost Vent Only?

http://whoisbyme.blogspot.in/2012/06/2009-mercury-grand-marquis-ac-blows.html

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AC not blowing through Vents on 2007 Chevy Trailblazer?

http://schematicsdiagram.blogspot.in/2012/04/ac-not-blowing-through-vents-on-2007.html

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Passenger side temperature is warm air out of dash vents?

http://schematicsdiagram.blogspot.in/2012/04/passenger-side-temperature-is-warm-air.html

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These will help.

Thanks.

Nov 28, 2012 | 2006 Ford Taurus

1 Answer

Air conditioner blows out defrost vents when acceleration.


In f150 truck there is a small vacum hose passenger side up by the windshield. It's a small hose check really good they dry rot and it will cause your vents to switch. Also if your box is bad. It's next to the battery

May 02, 2012 | Ford F-150 Cars & Trucks

1 Answer

2003 F-150 air conditioner won't select panel vents. Air is cold but stays on defrost vents, for a long time. Eventually switches at stoplight. Any ideas?


Sounds like you may have some sort of vacuum leak to the control head or a faulty control head. Actuators are vacuum operated.

May 06, 2010 | 2003 Ford F150 Regular Cab

1 Answer

Ac blows through defroster on max


The Climate control system in your truck has a gate that changes postition in order to change the flow of air from your face to defrost. The door is actuated by vacuum. Yours is still working otherwise it would be on defrost all the time. So you do have partial vacuum to the actuator but not enough to keep it in position when on high. Sounds like you have a vacuum leak but not bad enough (yet) to totally disable the gate.

Jun 21, 2009 | 2003 Ford F150 Regular Cab

2 Answers

Why does the ac on my 2003 ford f150 blow through the defroster


Most likely it is a vacuum problem. That's what controls the air flow flaps.

Jun 21, 2009 | 2003 Ford F150 Regular Cab

1 Answer

Ac on 2003 f150 supercrew blows air out defroster when on max


Check for vacuum leak going to air inlet door. Should be a white vacuum hose.

Jun 21, 2009 | 2007 Ford F-150 Harley Davidson

1 Answer

Air conditioning


I think it is going to be a vaccum leak.

Sep 14, 2008 | 2002 Ford F150 Regular Cab

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