A/C Heater Climate Control Problem (Vents Not Working)
Im trying to resolve some problems I'm having with my climate control in my 1997 Cherokee Sport XJ.
When you turn on the A/C or Heater none of the vents work. The heater works but the heat comes out of the floor area. The A/C doesn't work and none of the vents work either. If you turn the fan speed all the way up and switch the location of the vents on the controller, you can hear what sounds like a vaccum sound trying to switch the vents. However, no air comes out of the upper vents at all.
I was thinking that perhaps the A/C Heater Climate Control Unit is broken and this is why the vents are not working? However, I've heard that it could be the Rheostat and/or the fan relay or maybe a vaccum leak?
My question is: What should I do first to diagnose the problem?
Also, How do I check the Rheostat and or fan relay?
Thanks for the help guys!