Ok gentlemen and lady's, so the ol dodge started running pretty rough so I gave her just a basic tune up plugs, wires, disty cap, rotor button I had the battery completely out because my truck sits kinda high so I use the space to climb into the engine bay for the hard to reach stuff....... Anyway after I get it all put back together it's running smooth now however I noticed that my air now only works on the defrost it always worked fine with no problems before........ Is there something I could have jarred loose or do the doors operate on vacume? Could I have knocked a vac line off? Or is there a reset procedure I don't know about? It just really weird it worked fine until I did the tune up........ Thanks for the help

 

Well guys false alarm I figured it out I had broke a vacuum line it was a little teeny bitty one I was able to go get some of those connectors for it and fixed it it made it work just like new