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Heat for defrost is not as hot as panel

Discussion in 'Stock 2006 -2010 Explorers' started by tmarat, January 1, 2014.

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  1. tmarat

    tmarat New Member

    Joined:
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    City, State:
    Atyrau
    Year, Model & Trim Level:
    2008 Ford Explorer 4.0
    When heater is put into defrost airflow, then the heat is not as hot as in panel airflow. Is this normal? I don't have clicking noises in front, though rear AC does click and requires replacing both temperature blend and direction control motors. But this is about front module.

    From what I understand there are four modules in front that control direction and temperature blend:
    1) 18A318 (YH-1652) HVAC Blend Door Motor; Manual Air Conditioning ; Defrost Airflow, Plenum Chamber
    2) 18A318A (YH-1653) HVAC Blend Door Motor; Manual Air Conditioning ; Panel Airflow
    3) 18A318A (YH-1654) HVAC Blend Door Motor; Manual Air Conditioning ; Floor Airflow
    4) 19E616 (YH-1744) HVAC Blend Door Motor; Manual Air Conditioning

    Based on this I assume heater blend door is located prior to direction control motors (by airflow). Then as I don't have issues with panel airflow, then the fact that it doesn't blow as much heat to the windshield is by design? In cold mornings I can see that panel airflow starts to blow hot air earlier than defrost.
     
    Last edited: January 1, 2014
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