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Posted on Dec 12, 2010
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Problem with dual zone heating only one side i check control thermost botton is ok

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  • Lucy Gibson
    Lucy Gibson Jun 18, 2018

    I'm sorry to hear that you're having issues with your dual zone HVAC system. My husband is concerned that we might have a similar issue. When we try and he just the upstairs, the downstairs tends to get even warmer. With a situation like this, I suppose it makes more sense to hire a licensed professional with experience and a good reputation. http://www.universalrefrig.com/services/

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  • Posted on Dec 04, 2018
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Having HVAC system problems is not something that I am sure anyone would want to deal with in their life. It would probably be best for you to call a specialist to come and fix it so you don't have to worry about it anymore. That is what I would do since I wouldn't be able to fix it myself. https://newtonall.com/hvac

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  • Posted on Dec 12, 2010
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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.

  • 2 more comments 
  • Anonymous Dec 12, 2010

    The outlet door can also be stuck. Either way the 'box' needs to come out of the dash. if this is the case.

  • Anonymous Sep 23, 2013

    I need hvac repair in Fayetteville NC soon. Does anyone know of any good places around that area?

  • Anonymous Oct 24, 2013

    I've been needing help with my hvac in Calgary. Does anyone know where I could get a new one?

  • mikadot
    mikadot Oct 24, 2013

    This is the wrong spot to ask a question... but i spotted you. I live in Ontario. Try asking the question at the top of your home page

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