Question about 2004 Chevrolet Malibu

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My heater doesnt blow hot air when i turn the heat on it is cold. when i change the knob from hot to cold there is do difference. also my temp gauge stays where it needs t be right in the middle. help i need heat!

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  • Chevrolet Master
  • 8,984 Answers

Suspect it is the blend door actuator, but please see my tip at http://www.fixya.com/cars/r6235876-no_heat_fan_blowing_cold_air . These are generic instructions. If you get stuck or need specific instructions for your car, please get back to me with model, year and engine info. Below are instructions for replacing the blend door actuator, but don't replace it unless you're sure it's bad. Autozone has it for $36. First, take it out, plug the connector back in and see if it turns when you change the temperature control. If not, the problem can be in the controller or the actuator. If it is clicking, the problem is stripped gears. If it isn't doing anything, you can check for voltage at the connector with a voltmeter. Connect the black meter lead to a good ground point and probe the connector terminals with the red lead while changing the temperature setting.


Blend door actuator removal and installation:

  • Remove the fuse labeled HVAC CTRL (BATT).
  • Remove the left closeout panel.
  • Remove the knee bolster.
  • Remove the air temperature actuator screws.
  • Remove the air temperature actuator.
  • Remove the air temperature actuator wire harness connector.

    my heater doesnt blow hot air when i turn the heat - d02fb36.gif


  • Fig. Air temperature actuator removal
    To install:

    1. Install the air temperature actuator wire harness connector.
    2. Install the air temperature actuator and tighten the mounting screws to 13 inch. lbs. (1.5 Nm).
    3. Install the knee bolster
    4. Install the left closeout panel.
    5. Install the fuse labeled HVAC CTRL (BATT).

    Posted on Oct 31, 2010

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    • Contributor
    • 1 Answer

    Most likely your thermostat is not opening try replacing

    Posted on Oct 31, 2010

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    3 Suggested Answers

    6ya6ya

    6ya staff

    • 2 Answers

    SOURCE:

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    Posted on Jan 02, 2017

    Anonymous

    • 114 Answers

    SOURCE: Temperature gauge fluctuates and the heater blows cold air

    Sounds like the thermostat needs to be replaced. If you do the work yourself be sure the temp threshold is correct and the flow direction is correct when installed. Good luck to you

    Posted on Oct 16, 2009

    carl

    • 3640 Answers

    SOURCE: Heater does not get hot. Fan works but will only

    check coolant level, if ok change thermostat, it may be sticking.

    Posted on Jan 12, 2011

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