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2006 f150 super crew 4x4 5.4l manual vent controls vents will turn on and off but is stuck on upper vents it will only go to defrost or feet very rarely. when changing control you can hear something moving {noise} but nothing happens

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Inside the venting behind the control panel, there is a flap that directs the air flow. This flap is controlled by a vacuum operated actuator. The vacuum hoses that run the actuator also run to your controls. Check vacuum lines for cracks, check actuator with a vacuum pump tester, and lastly, remove venting cover and check that flap is not stuck.

Posted on Jul 27, 2009

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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
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I turn on heater and it sounds plugged when on front defrost? When I turn it to the feet it seems to work fine. Does not defrost front window while set that way. Where can I look. It is a 2009 Saturn...


There is internal vent flaps in the venting system to direct the air flow. The flaps can get stuck in one position. Sometimes the little motors that move the flaps can go bad. I would try to manually move the vent flaps. Pain to get to though as you have to pull some venting apart to access it.

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1 Answer

The upper air vents will not open so only the floor ones and the defrost will work


{: ) It is possible that the mode actuator is malfunctioning, and this is usually the cause in most cases. It can also be a stuck or binding mode actuator door.
Sometimes the wirings and connectors can give problems. If the signals do not reach the actuator properly, the control sysytem will assume a default mode position, and air will flow only to the floor and defrost vents.
Check carefully your climate control settings.

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1 Answer

Heater control to feet has never worked 95% of the time since new


sounds like vent flap valve wire has come off (under dash beried in plastic cowling.....

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1 Answer

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.

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1 Answer

Jeep AC blows cold air at defrost and feet but not through vents


There is a flap that directs the air. the flap is controlled by a vacuum actuator. This is located inside the venting. The actuator is connected to little vacuum hoses that attach to the temperature control switch. Either the flap is stuck, or the actuator has gone bad.

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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.

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