AC only blowing through defrost vents - Page 2 -
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post #16 of 17 Old 07-14-2013, 04:33 PM
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1998 ZJ 
Join Date: Feb 2013
Location: st charles
Posts: 78
In my case, all the vacuum lines under the hood are in good condition, and the vacuum tank hold preasure now!

My problem is with either the controller, or a vacuum line under the dash.

I used a rubber vacuum plug and plugged the AC vacuum port under the hood, now the vacuum line holds a steady 17 In Lbs.............

In the interum, I ran another vacuum line from a spare vacuum port on the manifold (drivers side), thru the drivers fender, thru the large rubber gasket for the door electrical stuff. Then I removed the vacuum line to the actuator above the gas petal, and voila, the AC now goes to the dash vents.

Note, I added an inline shut-off valve (i.e. used on fish tanks) so if i needed to switch back to defrost, all I needed to do was to close the valve.

This now allows me to use the jeep, and give me time as to find the real problem in the dash board!



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post #17 of 17 Old 07-20-2013, 09:49 AM
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1998 ZJ 
Join Date: Feb 2013
Location: st charles
Posts: 78
Turned out the vacuum line in the car was broken, replaced!

Higgins is offline  

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