Why does my a/c switch to blowing out of the defrost when I am driving?
SOURCE: air conditioning blows out defrost when accelerator is depressed
You need to open the vent, under the dash. Check the cable and moving action assembly. Make sure that it is all moving correctly. Some of the newer hvac systems in cars work off of vacume but most work with cables. Not big long cables, just small lever cables. also check your seals and make sure none of them are broken. I often find this is a bigger probel, the seal is cracked or broken or just came off and needs to be re glued in place. Don't be afraid to take the vent tubes apart as long as you can remember where they go.
SOURCE: 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.
SOURCE: 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.
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.
SOURCE: The AC blows up through the defroster going uphill or towing.
I have this same problem with my Cherokee, it seems to have something to do with engine vacuum. Could be a faulty EGR valve.
NO HEAT ON FLOOR VENTS
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As
per your problem mentioned. There are few solved help links to
troubleshoot these problems. Go through the list and Click the link below:----
http://whatisbyme.blogspot.in/2012/05/2000-toyota-avalon-no-heat-on-passenger.html
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http://schematicsdiagram.blogspot.in/2012/02/heater-blows-cold.html
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http://repairhelpcenter.blogspot.com/2012/01/hot-air-on-drivers-side-vents-only.html
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http://technoanswers.blogspot.in/2012/04/1992-toyota-camry-ac-control-light.html
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http://technoanswers.blogspot.in/2012/02/no-heatblower-blows-only-cold.html
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http://whoisbyme.blogspot.in/2012/06/2009-mercury-grand-marquis-ac-blows.html
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http://schematicsdiagram.blogspot.in/2012/04/ac-not-blowing-through-vents-on-2007.html
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http://schematicsdiagram.blogspot.in/2012/04/passenger-side-temperature-is-warm-air.html
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These
will help.
Thanks.
As
per your problem mentioned. There are few solved help links to
troubleshoot these problems. Go through the list and Click the link below:----
------------
------------
http://schematicsdiagram.blogspot.in/2012/02/heater-blows-cold.html
-----------
http://repairhelpcenter.blogspot.com/2012/01/hot-air-on-drivers-side-vents-only.html
--------------
-----------
http://technoanswers.blogspot.in/2012/04/1992-toyota-camry-ac-control-light.html
--------------
These will help.
Thanks.
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