Air Vents have a 97 Jeep Grand Cherokee with dashboard air vent problems. No air is comming through the dashboard air vents, It comes through the floor vents nor matter what setting I use on the controls. The side vents by the front doors have air. I can see the vacuum motors attempting to move the doors, but nothing happens, No vents air, no defrost, although the control for temperature of the air mixture worls OK.

I had the same problem and read through different forms and when I went under the hood - the vacuum line actually disconnected - put it back on and everything works great - thanks so much for your help

I had the same problem and read through different forms and when I went under the hood - the vacume line actually disconnected - put it back on and everything works great - thanks so much for your help

Check the vaccume line going into the firewall. Mine dry rotted and I had the same problem. I replaced the line and now it works fine.