What i discovered was this is a very common problem with my model of jgc 1999 2004.
Jeep tj blend door location.
The heat ac blend doo.
Further parts removal revealed stripped mode door gears one per door and jammed mode doors.
Mode switch did nothing.
At the time i forced the mode doors such that air only routed to the upper vents and disconnected the linkages.
This is a kit to do a complete repair on the blend door malfunction that is common to the 97 01 jeep cherokee.
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My problem was the no matter where i set the vent selector the air mostly came out of the dash vents.
I got underneath and found that the actuator was turning.
The blend door actuator motor is located in the upper left hand corner of the passenger side foot.
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The best part is our jeep wrangler air blend door actuator products start from as little as 28 99.
Our grand cherokee wk was making a knocking sound under the dash and only blowing heat.
A premium hvac heater blend door actuator replacement for 200 2011 2014 sebring aspen dodge durango caliber jeep compass patriot wrangler ram 4 4 out of 5 stars 43 14 98 14.
The design is inherently weak and relies on a calibration phase that puts intense pressure on the weakest points in the system.
See me troubleshoot and replace defective part.
Every cherokee in this range either has or will have this common failure.
This includes when i have it set to defrost it will bl.
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I love my jeep but the person that designed this blend door actuator system needs to find new work.