When I turn my air conditioning on no air comes out of the vents. Just the defrost vent under the windshield. I have tried all the setting and it makes no difference. Why is this happening

 

blend door actuator? Controller?

 

Jeep egg.

 

Turn the fan to low. Then turn AC to on position, then you can turn the fan up. This is what works on mine. If fan is on full blast when it turn controls on it goes to defrost vents.

 

Vacuum line next to the battery breaks really easy if your not careful changing the battery. That also will cause your cruise control to act up.

 

This may help:

 

Check the vacuum lines as indicated above, from the reservoir under the bumper all the way to the engine block. If there is nothing visibly broken, replace it all. I had the same issue, but no visible cracks or breaks in the connectors. I replaced the tubing and plastic connectors and all works fine now.

 

I had the same issue and it was the lines/hoses that lead from the system...

 

Best bet is to just relocate the ball to the engine compartment and eliminate the spaghetti.