For all of those that are experiencing the problem with the defrost actuator not working, I came upon a possible solution. Credit needs to go to a member of the Diesel Truck Resouce web site. He turned off the fan control, then cycled the actuator control, and it worked! Mine has been inoperable for a couple weeks, and with the current cold snap here, I was having fits in the morning commute. Hopefully this is repeatable, but I'm not going to try it until it warms up a bit.
There seems to two different issues, possibly related. Some guys just cant get defrost (thats me), and some can't get the air to change from the dash vents (there are three different deflectors in the system). Hopefully this works on both scenarios.
There seems to two different issues, possibly related. Some guys just cant get defrost (thats me), and some can't get the air to change from the dash vents (there are three different deflectors in the system). Hopefully this works on both scenarios.