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99 Ford F-150 a/c cold but not blowing out vent. All switches work fine.air won't blow out vent

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  • Anonymous Jan 08, 2018

    Did you find the problem? I had a hose disconnected under the hood left side against firewall on top of a black box covering the solenoid housing.. the hose slipped off a plastic connector, and would not stay on, one drop of super glue still holding 5 years later..

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Fan motor, or possibly blockage in vent tube

Posted on Jan 08, 2018

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  • Expert
  • 69 Answers

Check the actuator under the dash.replace if it doesn't hold vacuum.

Posted on Oct 17, 2017

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6ya6ya
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Posted on Jan 02, 2017

  • 142 Answers

SOURCE: a/c problem

You either have a bad control, or motor running the air direction door in the front HVAC unit, or a door that is stuck.

The front and rear units are totally separate.

The door directs where the air, cold or hot, should come out, whether it is panel vents, floor, defrost, or any combination of those.

This door and motor are located inside the heater box which usually requires a lot of the vehicle dash assembly to be taken apart to get to these parts.

Posted on Aug 28, 2008

  • 2920 Answers

SOURCE: 2002 GMC Yukon blows cold air from the front, rear works fine

check you antifreeze level and make sure its full

Posted on Jan 26, 2009

harley9701ha
  • 424 Answers

SOURCE: Temperature Control not working on 1999 Ford Explorer

Sounds like your temperature actuator is not moving or your temp door is broken. On max a-c ,coolant is shut off to your heater core allowing only cold air in.

Posted on Jan 26, 2009

  • 2976 Answers

SOURCE: no heat - ac stays on blowing through defrost vents

If you have the heater directed to the windshield, the AC will turn on. Move the control away from defrost.

Posted on Feb 01, 2009

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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2 Answers

1999 f-150 air blows stops blowing heat blows out cold then overheats


First The heading says 99 Taurus but the question says 99 f-150. Second, are you saying that the engine is overheating? The heater won't work if the level of coolant is low and that would explain overheating. The thermostat controls the temp of the heat, so if it is stuck closed then water can't circulate to the heater and the vehicle would overheat, but this is unlikely.

the other answers seem to concentrate on a non-working heater. Good luck with this problem.

Mar 05, 2014 | 1999 Ford Taurus

1 Answer

Heater not working on 2010 f-150


If both heater hoses are hot, and the radiator is full of coolant, it may be a blend door problem under the dash.
The blend doors direct air thru the heater core and out thru the vents.
It may still be under Ford warranty.

Jan 16, 2013 | 2010 Ford F-150

1 Answer

I have a 1999 Caddac DeVille . The AC works fine during the summer but in the winter it won't blow out hot air unless I'm driving. I've let the car run in the morning to warm up but the inside...


your heater core is possibly stopped up if there has been a radiator leak and stop leak has been poured its definetly clogged or could be a faulty thermostat

Jan 07, 2013 | 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

1997 ford explorer xlt. max ac works fine but when i switch to normal ac or change vent control it blows out heated air. How do i check or repair?


The blend door actuator is probably bad in it causing the warm air to blow out instead of cold air. It is behind the dash.

It may take several hours for a technician to get at it and replace the parts required for it to work again.

Aug 19, 2010 | 1997 Ford Explorer AWD

3 Answers

99' Escalade a/c front vent blows cool air an rear blow cold air.


i have the same problem, my rear a/c blows great very cold, the front a/c blows but it is not cold at all. I had the the a/c seviced and it was vacumed and correct ammount put back in, no problems, the front still blows but it is not cold, i have checked everything and the a/c guy said it might be the door not opening. any help? still not working

Jul 13, 2009 | 1999 Cadillac Escalade

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

3 Answers

2004 Ford Expedition XLT, front blend door actuator


Hope I was avle to help, glad you up and going.

May 26, 2009 | 2004 Ford Expedition

3 Answers

My 99 ford f-150 blows only hot air.


The A/C system has a pressure switch will keep the A/C from running if the freon is low. It prevents damage to the A/C compressor from low freon.
My bet is you'll need to recharge the A/C system.

Apr 14, 2009 | 1999 Ford F150 Regular Cab

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