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2007 Buick Lucerne Heater Actuator

I believe the heater actuator needs to be replaced in my 2007 Buick Lucerne. Blowing cold air on passenger side and if I put on internal recirculation it blows some warm air. I was told to disconnect the battery for a minute or so and this didn't help. How hard is it to replace the actuator on the passenger side. Please tell me the dash doesn't have to come out. Thanks in advance. Gary

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  • 79 Answers

Check basics first: is there hot water being fed to the heater core?,does the valve work (open/close)that feeds water circulation to the heater core????. Hope this helps. Alberto

Posted on Feb 10, 2014

Testimonial: "As I meant to in my first post (sorry I didn't) the drivers side is getting hot but not the passengers side. This is telling me the core is getting hot and circulating the coolant through the cooling system."

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6ya6ya
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Posted on Jan 02, 2017

  • 651 Answers

SOURCE: heater blowing cold air

squeeze the hoses to get any air bubbles out and refill coolant as necesary. are you sure you put thermostat in the right way? may be backwards. also may be your sensor.

Posted on Jan 04, 2009

  • 91 Answers

SOURCE: '98 Chevy S-10 Pickup heater blowing cold air

the temp door is located in a box behind the glovebox, the actuator is either under or above the box. if you remove the glove box you should be able to see it.

Posted on Feb 03, 2009

michael_grey
  • 365 Answers

SOURCE: cold air on passenger side warm air on drivers side

Actuator motors either get a tear in the rubber or a hose is broken and not letting vacuum assist in its opening.
You can try moving the lever by hand and see if the air gets colder on the bad side.c976077.jpg

Posted on Aug 04, 2009

  • 436 Answers

SOURCE: How do you fix the driver side air blend door actuator?

you cannot repair the actuator you need to replace it with new one. These motors turn but get weak with time. if you test it, it works, put it in and it doesn't. this is because the motor is weak, unfortunately GM does not sell these motors separately.

Posted on Aug 23, 2009

c17hydro
  • 2984 Answers

SOURCE: location and removal of the air vent actuator

Removal & Installation

  1. Remove the floor air outlet duct extension from the floor duct.
  2. Remove the center console, if equipped.
  3. Remove the screws from the center console duct, if equipped.
  4. Remove the center console duct, if equipped.
  5. Disconnect the electrical connection at the mode actuator.
  6. Remove the mode actuator mounting screws from the HVAC module.
  7. Remove the mode actuator as an assembly with the actuator cam.

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Mode actuator location

To install:
  1. Install the mode actuator as an assembly with the actuator cam.
  2. Line up the heater/defroster valve lever with the mode actuator cam slot.
  3. Line up the A/C valve lever with the mode actuator cam.
  4. Install the mode actuator mounting screw to the HVAC module and tighten to 14 inch lbs. (1.6 Nm).
  5. Connect the electrical connection at the mode actuator.
  6. Install the center console duct, if equipped.
  7. Install the screws to the center console duct, if equipped, and tighten to 14 inch lbs. (1.6 Nm).
  8. Install the center console, if equipped.
  9. Install the floor air outlet duct extension to the floor air duct.
  10. Calibrate the HVAC module actuators.

Posted on Apr 18, 2010

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