Do you have the problem?

The usual symptom is an inability to effectively control the temperature in your car. Note that this symptom can also be caused by a bad temp control knob, and this is a common failure on Ford trucks. Please check carefully before considering the blend door fix.

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.

Another reported symptom is a clicking sound coming from the actuator motor. This occurs when the motor gears get out of alignment and are slipping against each other, making the noise. Sometimes you can make it stop by pushing down on the back of the motor and getting the gears to catch. The failure usually occurs with a broken blend door that allows the motor to get out of alignment and twist slightly, causing the gears to disengage. Heater Treater will put the system back in alignment and correct this problem.

Important! 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:

1. 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.
    
2. Some XJ’s, particularly the dual control systems used the later design which was continued through 2004. This system has the actuator motor on the front of the box behind the glove box opening. You will need to empty and fully open the glove box to see the motor. On the right side of the box there may be a dampening assembly. Remove this by pulling the attachment up and out. (This is a miki-mauze assembly and was eliminated on later models. Our recommendation is to pull this out and throw it away. Consider this as an upgrade to the older system.)

   With the box half open, you will see two black rubber stops inserted into the dash frame. Pull these straight down to remove. Watch carefully how they come out since they have to go back the same way. You can re-insert the stops with the glove box fully open and the glove box will slide past the stops fit properly. The actuator motor is in the upper left hand corner behind the glove box. A picture of the motor is included for reference.

This kit is for the earlier (#1) above system. If you have the second type of system, check our 98-04 Grand Cherokee listing for the correct fix.

Step Three: Get The Solution

The Heater Treater Kit does the following:

• Replaces the plastic blend doors and axle with stainless steel components.
• All work is done through the glove box opening and no disassembly of the dash or evacuation of the AC system is required.
• Tools required are a screw driver, pair of pliers, and a Dremel tool (purchased at any Target or hardware store).
• Includes detailed instructions and all hardware required to complete the fix, including dremel bits and metal tape to seal the cut.
• The repair will take about an 90 minutes the first time, and once you have experience, about 45 minutes.
• No extensive mechanical skills are required.
• The instructions are dual-level, for mechanics and a “Instructions for Dummies” version.
• The fix is really easy and MUCH preferable to disassembly of the entire dash and engine cooling systems.
• We provide customer support via email or phone if required.
• Further Technical Information available.

Our goal is to make sure that every installation is successful. To date we have achieved 100% success and have no intention of letting up. Heater Treater will solve the problems with the blend door and is over-engineered to outlast your Jeep.

100% Success Rate Guarantee

Heater Treater has a perfect success record on all of our products. We offer free customer service and will walk you step-by-step through the entire installation process. If for whatever reason our product does not work for you, or you are in any way not satisfied with the result, we offer a money back guarantee. There’s no risk involved.