Jeep Repair: 2000 Cherokee Heat/ac mode selector, blown fuse, vacuum leak

Question
QUESTION: The Heat/ac mode selector does not respond. The air always blows out the defroster. I checked for a blown fuse but did not find one.

ANSWER: U have a vacuum leak  what  engine size do u have?I live in the Atlanta area I would be glad to look at it for u.

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QUESTION: It's a 4.o l 6 cyl. When is the next time you'll be in Colorado Springs?

Answer
Hehe  We have some family Family in Penrose  and Denver.
Check the check valve thats is right off of the intake manifold. The vac live will pop off due to heat and such,if so  cut the line a little or if u can get to some vac line  just replace that part .