1999 AZC system. heat on driver's side, blowing cold on passenger side. have whole dash out, need to see what holds on blend door unit

The most common cause of this is that you have a stuck air temperature control blend door, this can be a motor actuator issue or a jammed door or both (common). To replace both parts you will need to completely remove the dash from the car to access the blend door.

blend door motor is bad or blend door is stuck. You will need to remove most of the dash to access it...not a beginners job.

I have taken my 2010 Dodge journey in 3 times. Actuator replace system flushed out and still no one knows the answer. It's getting cold here so I think the answer is sell it.

They are not vac on the h2. there is 2 for temp control, one for recirc and one for blend. check the hummer forum as there is a great read for it there. the driver side actuator is really ez as it's under the glovebox, 20 min fix. the rest take removing the whole dash but it's not that tough.

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.

same thing happened to mine at 2 yrs. old , the connecting arm on air mix positioner broke. The whole dash had to come out. Part was cheap but labor was huge. This is not a job for the do-it-yourself.

need to replace recirculation and blend doors, for this need to take whole HVAC housing assy. out and take it apart to replace them, this means removing complete dash assy. possible 6 to 8 hours

Hi,
There are separate blend doors for the passenger and driver's side. The blend doors divert, not block air, so it is unlikely that the blend doors are the problem. You need to check the operation of the re-circ door.
There may be some more duct work that attaches to the heat/air conditioning housing under the dash, that supplies air and or heat to both the driver side and passenger side of the car, the duct work on the driver side may have come disconnected.Check this also.
Hope this helps
Thanks
Smith.

Check the operation of the drivers blend door actuator. Sounds like its stuck or broken. Does the temp display on the dash flash?

Blend door for passenger side or blend door motor has failed. Very big job to remove dash and work on it. Except the door motor is accessable from the glove box.
Rudy