hot & cold?

[tatt2dwater]

My 05 Rubicon a/c & heat both come out of the defrost vent ONLY.. Whats the deal? Im sure its a relay, but how do I know which one & where? One day it worked as advertised, than the next nothing defrost only?
PLEASE help! Mechs here are startin @ $100 hr to trouble shoot.! Thats way NO bueno! :?|

 

[jfrabat]

I dont know about the newer Jeeps, but on my '94, this is controlled mechanically (part of it is controlled trhough the vacuum system)... I had to put a vacuum reservoir so that when I was at WOT going uphill, the hot air from outside would not come into the Jeep (driving with AC).