Question about 2002 Ford Explorer

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My A/C controls only blow out of the Defrost function no matter what I have it turned to. Max AC, and all only blows out like the defrost is on....is this a fuse issue or a wiring issue?

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Most of the time it is the blend door actuator

Posted on Jun 04, 2009

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Posted on Jan 02, 2017

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1 Answer

My heater and ac only blow through the defrost


the actuator to the defrost door is inop. try running the climate system thru all the modes ac heat defrost vent off etc, maybe it will begin operating . look for any vacuum leaks

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1999 durango vent control switch will not let AC blow threw vents only defrost


Usually this is a problem with the blend doors under the dash. You either have a vac leak, a dead motor, or a faulty door.
The control opens and closes the doors to direct air thru the heater core and evaporator core along with directing air thru the vents.
When a problem occurs, the default position is the defrost vents to make sure the windshield remains clear.
You can do an internet search for "repair durango blend door" for more info.

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1997 Ford F150 Air Management Problem. When Fan turned on it only blows to defrost no matter what I set it to AC, MAX AC, PANEL or FLOOR. Visually inspected vacuum line behind battery looks ok. What...


The air flow is controlled by vacum. I would start by inspecting all the hard plastic vacum lines under the hood. If you find none broken or loose , then inspect the control panel. by "default" the air is derected to the defrost position.

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1 Answer

I have a 2006 pt cruiser and the ac works fine but only blows through the top vents (defrost) it dont matter where i put the knob at it only blows through the defrost on top i can turn it to blow through...


If the mode door is vacuum operated, you have a vacuum leak. If it's an electric motor, you have an issue with the motor or controller circuit - or the switch. To properly diagnose you'd need a Tech2 or multiple diagnostic interface and GDS software.

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2 Answers

2001 f-150 ac


what it seems like is that your front blower may be bad or went out or there is a short in one of the functions

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1 Answer

2004 Chevy Silverdo Crew Cab


if your ac is on max i believe it recirculates the air in the car by sucking air in by the defrost vents and blows it back out of the normal vents try to move the controls to make sure the that the shutters are working and make sure the ac is not on max by selecting the knob that has an arrow going through the little car instead of the circular one that might fix the problem

Jun 29, 2009 | 2004 Chevrolet TrailBlazer

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

1996 ford mustang convertible ac blows cold only from defroster


Does it still blow out the floor and defrost when you set the switch to those positions or does it alway blow out the defrost no matter what? If you can get air to blow out to the floor, then it sounds like you lost the switch that controls the airflow to the vents. If it only blows out the defrost, then you probably lost the vacuum to all of the switches. When the vacuum is lost, it will only blow out the defrost. Check the smallest line on the vacuum distribution block located in the corner near the brake master cyclinder. That line provides the vacuum to control the direction of airflow within the cabin.

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