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My 03 h2 has no heat. I get cool air blowing out the vents. My defrost rear vents same thing. Then today all of a sudden,air stopped blowing thru the drv side but all other vents remained the same.

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This is most likely due a failure of a part called the air temperature control blend door actuator motor and that is often caused by a sticking blend door that the motor drive operates that has become warped from the heat of the air on heat mode. The dash must come out to repair these parts.

Posted on May 03, 2017

  • Nick Melendez
    Nick Melendez May 03, 2017

    My luck it couldn't have been the easier actuator. Lol

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My heater and ac only blow through the defrost


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The control opens and closes the doors to direct air thru the heater core and evaporator core along with directing air thru the vents.
When a problem occurs, the default position is the defrost vents to make sure the windshield remains clear.
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