Question about Jeep Grand Cherokee

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My air wont blow out of upper vents only dash on my 2000 jeep cherokee

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  • Jeep Master
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This may be due to a bad actuator motor or vacuum leak, this all depends on what type of system is in this jeep, open the hood and start the engine allow it to get warm and look and listen, you want to look for a vacuum hose thats off or leaking, this hose goes onto a port on the intake and goes to the pass/side firewall where it goes through the wall and inside to controls, listen for a hissing sound.The hiss noise is what a broken line sounds like,if this system is actuator controlled then there will be no vacuum lines, instead it uses about four actuator motors to control the heater system settings, the actuators are located on the heater box, the box is located under the dash area. and sits from driverside to pasengerside, i will see if i can locate a diagram to help you, this is a little to locate the bad actuator as there are so many, but a good way is to locate one by one and watch it as you move each control of the heater system and see if it moves, you will do this to each actuator until you locate the one that doesnt move, that will be the bad one,i think yours is vacuum operated. this diagram shows the box and some vacuum operated valves. good day and hope this info helps.my air wont blow out - johnjohn2_111.gif

Posted on Apr 02, 2011

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Posted on Jan 02, 2017

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