A/C Blower motor works, but no air flow through the vents?

[Cantu BPS]

I have a 2005 Dodge Dakota and I am not getting any air through my vents. I've tried all the different vent settings. The blower motor is working. I can hear the motor running and changing speeds, but only once in a while it will actually blow the air through the vents. The rest of the time it seems to be blowing the air outside or something. It seems to get a little better air flow (not much better) when it is set for the outside mixture and not on recirculate. Thank you for you help .. BC in Austin, TX.

[sweet69firebyrd]

You might want to check the cabin air filter they can get pretty nasty. if they get plugged up no more airflow. You might also wast to check your vacuume lines under the dash, you might have a vent door not opening.

[jetengine767]

1. There is a problem somewhere in the vent system with the doors that direct the airflow to the different vents. They are probably stuck closed or not getting power.2. Something is stuck or lodged inside the main vent coming from the blower.3. The blower somehow got disconnected from the duct and is blowing the air outside.4. The evaporator coils are frozen solid not letting any air pass through. Try turning on the heater for 15 minutes or so. If you get air through the vents then the a/c's evaporator could be the problem. If you still don't get any air, then it's probably not the problem.5. The switch/dial that lets you direct the airflow to different vents could be faulty.6. The blower fan could be clogged with dirt or something else that it sucked up.7. The a/c's filter could be clogged.Hope this helps! :-)

[Dave Bannerman]

My best guess is the Air Blend Door that is mounted inside the unit just above the passenger side has failed to move or is jammed. On my Jeep I had two doors I think that were on motors, one would open up the heat and the other would direct the flow. Try feeling at your feet or at windshield vents to see if cold air is there. This would tell me that one of those motors that flaps a door shut is non operational or door is jammed. Most newer cars will give a error code for this malfuntion.

[exbus155]

there are dampers in the duct work like doors that open and close to direct airflow . they are usually controlled by vacuum pressure. so i would check for a loose vacuum line.