Hey guys, I'm a member over on the DT forums, and I had this issue. I noticed a few folks have the same issue over here, and hopefully they were able to fix the problem. If not, here is the fix to why no air (hot or cold) blows out of your vents. Sometimes hot blows out, sometimes cold blows out, sometimes nothing blows out...

You need to replace the Blower Motor Resistor pack located under the passenger glove compartment!

Here is the tutorial: http://www.gtrippleb.com/auto/durango/tech/durango_blower_resistor.htm

I fixed mine in about 30 mins and cold air and heat blow like crazy now.

The vents on the front and the far back blow very good on my Durango (2001) but the center ones over the the second row seats do not. Is this normal or should I try changing the resistor