Hello all, my 05 2500 is having trouble with the recirculation control for air intake. When the AC is on, I only am able to get it set for fresh air, when I turn the *** to the left to take advantage of recirculation nothing happens. Used to work find a couple of days ago.

So, is there an access point near the fan motor below the dash on the passenger side? Is this a "servo" problem and if so, where to look and is there a diagram?

Thanks much.

 

Take a look here:


https://www.dieseltruckresource.com/....html?t=170393

 

Thanks much, I just found that on the forum - I guess I did not search for the right terms - like accuator!

 

This is another good thread on the subject.

https://www.dieseltruckresource.com/...vac+understood