Do you have the problem?
The usual symptom is an inability to effectively control the temperature in your car.
The blend door hangs on a vertical axis, so turning a sharp corner, or fiddling with the fan speed can swing the door into the hot or cold position randomly. While the symptoms are fairly conclusive for blend door failure, the only way to really check it out is to remove the blend door actuator motor and look at the axle.
Chrysler two different HVAC systems on the early Grand Cherokees. You need to check the application information below carefully to make sure you know which one you have.
There were two main systems used for the GC:
- The earlier system has the blend door actuator motor on the bottom of the heater box. The motor is located under the passenger side dash, above the transmission tunnel. Open the passenger door and kneel to look under the dash. You will most likely have to pull back the carpeting on the left side to see the motor. It will be attached to the bottom of the box. A picture from a box that was removed from a GC is shown for reference.
- Some early GC's have mechanical control over the blend door and there will be a slide cable on top of the box. Our kit only works for the electronic version with an actuator motor on the bottom of the box. It's easy to check before ordering.
This kit is for the earlier (#1) above system. 98 was a changeover year for the GC and some may have the later model plenum box, check our 98-04 Grand Cherokee listing for the correct fix.