Hoop, this thread might help (hopefully) http://www.wranglerforum.com/f5/vacu...m+line+mystery
Ignore the part about removing the battery, but it should help a little bit
If you have more questions about the diagram or where the lines
connect, post them, & I'll help if I can.
Looked at all the connections. Both under the hood and behind the switches. Didn't see anything I could tell was leaking. Did notice though that my fan switch blows harder on the low setting than the second setting. Then the third jumps back up. Always something coming out at the feet though. Eventually I'll get it..... Prob do it all again this weekend.
I thought I had the same problem and battled it for weeks. Turns out it WAS NOT the A/C duct throwing the heat, but rather the rubber boot around the automatic transmission shift cable. The hole in the firewall is about 2" in diameter and right behind the exhaust manifold. It has a rubber boot around the 3/8" cable and suppose to snugly fit into the 2" firewall hole. Mine was inadvertently pulled out leaving the 2" gaping hole and heat poured through it when the engine warmed up in a matter of 2 minutes. Check yours, it's easy to see right behind the floorboard air box, next to the accelerator cable.
That isn't the problem with mine. I just went and checked. I just checked and put it set to blow out of the dash as well as the foot blower, up top was ice cold, lower was hot as heck! It didn't get better with time either. I turned it up full blast and it seemed to get hotter down low. Anyone else have any more advice? Texas heat is starting to be killer!!!!
A/C units have valves that are supposed to open and close letting in more cold or warm air, sometimes the valves get worn and stick. so it it's stuck it's gonna be letting hot air in and block any cold.
Same thing for me, floor vents are warm air and top are ice cold. Not a problem here because weather never gets over a hundred or so. It hasn't bothered me enough to think something was wrong, just thought it was another Jeep thing
So is there a way to close those vents? Thanks for the info!!
I'm not sure about how to close them manually,
but you can look under the dash from the drivers side while you or someone else cycles the mode switch through all of its positions, and see if all of these vacuum actuators are working properly (or if they are working at all)
Get your head down near the brake pedal and you can see these 3 actuators, you will know your in the right spot when the interior light under the dash burns your right ear, lol