Air vent selector not working?

Hi,

What you described sounds like it is related to what is called the mode door actuator. This actuator is responsible for air flow direction. It could be stuck between the settings.

On this vehicle, there are two mode door actuators, one for the defroster and the other for the floor and panel vents.

I attached the directions below for the removal and replacement of both. What I suggest is this. Remove one at a time and inspect the gears on it first. If they are good, then with it plugged in, see if it reacts when you change the air flow direction.

Let me know what you find.

Joe

See pics below.

Hi,

The blend air door actuator is what controls the air temperature entering the truck. It is basically the same as the mode door actuator.

Did you try removing the actuators to see if the motor works when making adjustments? I ask because you won't see anything move unless they are removed. There will be a small gear on the actuator that turns in different directions. That is what I need checked.

Let me know.

Joe

Hi,

I understand your concern. Do it this way. Remove it and then apply voltage to the connector pins to see if it moves.

Let me know, and thanks for asking. I don't feel the airbag would deploy, but it is a good idea to leave the battery disconnected.

Take care,

Joe

Hi,

I attached the schematics below for the entire HVAC circuit. They are for a 2006 2500 with the 5.9L. There is no listing for the Laramie mega cab, so I suspect they are the same.

Let me know if this helps.

Joe

See pics below. Note: The schematic was two pages. I cut each page in half to make them readable for you. I did overlap them so you can follow from one to the next.