Question about 1999 Jeep Grand Cherokee

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Afternnon, just wondering about the best way to locate the blend doors in the hvac box without ripping out the dash on my 2000 jeep grand cherokee. Thanks in advance. Duane

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Y9ou can gain access to the driver side blend door actuator by removing the glove box. The actuator will be in the left corner of the glove box opening. If you remove the actuator you will be able to turn the pin. If you can turn it 360 degrees the blend door is broke.

If your lucky its only the drivers side. If you get the repair kit from chrysler it will come with instructions with pictures on how to replace the blend door without pulling the HVAC unit/Dash. If the passenger side is broken the HVAC unit will need to be removed.

Heater treater (google them) also have a metal blend door replacement and instructions online on how to replace them without pulling the HVAC housing.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

Posted on Nov 28, 2010

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1 Answer

Air vents warm air on drivers side cold air on passenger side?


There are several things that can cause this problem with Jeep Grand Cherokees. The actuator (door motor) can cause this, the door could also be broken. Your failure description is the classic fail description for broken blend doors, and this is a common problem on the GC. There is an inexpensive DIY kit on Ebay from JGCParts that will fix the problems without having to remove the dash panel.

The HVAC system is computer controlled and when the doors break, the computer senses that the movement of the doors is out of spec and shuts the motor down. Actually it is rare for the actuator motor itself to go bad. Usually it's a broken door combined with computer control. You can check the motor with a 9V battery and a snap connector. Just touch the wires to the motor terminals and check that it turns.

Assuming you are going to replace the 99/04 Jeep Grand Cherokee blend doors yourself.
You would start by disconnecting the negative battery cable.
If you are going to remove the dashboard, etc to replace the blend doors.
some websites give you complete instructions with plenty of pictures.
It will take the average person with little or no auto repair skills approximately 12 to 16 hrs.
The vehicle will have to be taken to a shop that can recover the refrigerant before you start removing the dashboard and HVAC box..

If you are going to do the type of repair where you cut an access hole in the side of the HVAC box.

A short version of how the access hole repair is done:
- Disconnect the Negative battery cable.
- Lower the glove box
- Remove the actuator motor - You will need a Phillips screw driver
- Cut an access hole in the plastic HVAC box - Use a multi-purpose cutting bit, you will need a rotary type of cutting tool, like a Dremel, RotoZip, etc. Or you could do the cutting by hand with any type of small cutting tool, it will just take longer doing it by hand. Or some people have used a narrow pointed soldering iron!
- Remove the broken blend doors
- Install the new blend doors.
- Replace the actuator motor.
- Close the access hole - Replace the wall piece of plastic you cutout -Use foam tape or an aluminum tape to cover the groove made by cutting the wall.
- Close the glove box.


Keep us updated.

Jan 11, 2011 | 1999 Jeep Grand Cherokee

3 Answers

Problem with dual zone heating only one side i check control thermost botton is ok


Sounds like the blend door actuator. It separates the driver and passenger side from getting air on the AZC system. Here are some instructions on replacing it:
The passenger side blend door actuator is used on all models equipped with Automatic Zone Control (AZC). This actuator is located on the front of the HVAC housing to the right of the floor panel transmission tunnel and cannot be removed from the passenger compartment without instrument panel or HVAC housing removal.

NOTE: This procedure is for AZC Systems (Passenger side only).

  1. Disconnect and isolate the battery negative cable.
  2. Remove the glove box door. See: Body and Frame\Interior Moulding / Trim
  3. Remove the lower I/P glove box door surround panel.
  4. Remove the dash assembly. See: Body and Frame\Interior Moulding / Trim\Dashboard / Instrument Panel\Service and Repair\Instrument Panel Assembly
  5. Remove the HVAC assembly. See: Housing Assembly HVAC\Service and Repair
  6. Unplug the wire harness connector from the blend door actuator.
  7. Remove the 2 screws that secure the blend door actuator to the HVAC housing.
  8. Remove the blend door actuator from the HVAC housing.
INSTALLATION - AZC (Passenger side only)


  1. In stall the blend door actuator on the HVAC housing and tighten the two mounting screws to 2.2 Nm (20 in. lbs.).
  2. Plug in the wire harness connector to the blend door actuator.
  3. In stall the HVAC unit into the vehicle. See: Housing Assembly HVAC\Service and Repair
  4. Install the instrument panel assembly into the vehicle. See: Body and Frame\Interior Moulding / Trim\Dashboard / Instrument Panel\Service and Repair\Instrument Panel Assembly
  5. Evacuate the HVAC system.
  6. Recharge the HVAC system.
  7. Connect and the battery negative cable.
Hope it helps! If you need more, just send me an email at familyguy77351 at yah I wil be glad to finish helping you with more detail.

Dec 12, 2010 | 2000 Jeep Grand Cherokee

2 Answers

AC blows from the foot and defrost but not the console.


If your Grand Cherokee is equipped with dual climate control, then it sounds like your blend doors in the heater box have broke and aren't switching. I would bring it to your local Jeep dealer and have them look at the HVAC for blend door faults. Usually fault code 54 for blend door travel too large will come up. It is a rather expensive repair to have the blend doors replaced because they are part of the heater box and the dash has to be removed.

Best of luck

Jun 13, 2010 | 2001 Jeep Grand Cherokee

1 Answer

Heat is out on 1999 jeep grand cherokee limited


I had this problem on a 99 grand cherokee limited, It was the heater blend doors and if you have dual climate control one side usually goes out before the other. These blend doors are located behind the glove box unaccessible inside the HVAC shell.
(http://www.wjjeeps.com/hvac_sub_assembly.htm) Motor failures for this HVAC sub assemblies is also something to look for although much less common.
My local dealership estimated $$$$$$$$$950.00 because they have to remove the entire dash so I looked around for something else.
http://cgi.ebay.com/ebaymotors/Blen-Dor-Jeep-Grand-Cherokee-Blend-Door-Heater-Repair_W0QQcmdZViewItemQQhashZitem3eef1e1cd6QQitemZ270299700438QQptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccessories

I used something similar to this and now have heat that is controlled solely by the knob nearest the driver. It wasn't very difficult just kind of a tight squeeze.
Hope this helps
GOOD LUCK

Jan 09, 2010 | 1999 Jeep Grand Cherokee

1 Answer

Just replaced Blend Door - Temp now Reversed!


never done one ?? but from what you describe you have fitted an actuator arm back to front

Dec 21, 2009 | 2002 Jeep Grand Cherokee

1 Answer

2000 jeep limited grand cherokee the driver gets heat hot, but the passenger side gets cool air. why?


Broken blend door assembly inside the hvac housing. The recirculation door frequently breaks too. The dash has to be removed and a/c system discharged to perform repair.

Dec 17, 2009 | 2000 Jeep Cherokee

1 Answer

Only have luke warm heat from heater changed thermastate did not help what else could it be


The Blend door in the HVAC box. Unfortunatly this is the main cause of this type of problem u have to remove the dash and replace the blend door and the acuator.

Oct 13, 2009 | 1997 Jeep Grand Cherokee

1 Answer

Climate control issues. Hot on drivers side and cold on passenger


Unfortunately this is a pricey repair. It sounds like the passenger side blend door is broken. The doors in the HVAC box are a weak point in the system. It's not uncommon for them to break and cause the situation your experiencing, or sometimes the reverse. It requires removal of the dash board to replace the blend doors. I'd say it's probably at the least $1k as it's about a 7-8 hour job.

Oct 12, 2009 | 2000 Jeep Grand Cherokee

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