Blend door help

Discussion in 'Tech Info' started by Whodat739, Oct 26, 2016.

  1. Whodat739

    Whodat739 Junior Member

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    Ram Year:
    2003
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    2003 dodge ram 1500 4.7 . I only have air that comes out my dash vents. I need to change the blend door I think. I changed the recirculation door but that didn't fix it. Where is the blend door located? Also is it hard to change? Also I only have hot air coming out my passenger vents the AC works great on both sides. Thanks
     
  2. Core-Lokt

    Core-Lokt Senior Member

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    Ram Year:
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    I think you need to replace Mode 1 and Mode 2 doors if you're not getting airflow from other vents (defroster, floor). Those are a bitch to replace; they're behind the center stack and necessitates pulling the dash. It's a costly repair, so I would recommend doing it once and replacing all the doors. You can additionally test the actuators, but they seldom fail. To test them, get a 9V connector and battery. Touch a lead to each pin on the disconnected actuator. 9V is sufficient to make them move and they're not polarity-sensitive.

    There is the HeaterTreater repair method (search for it here or in a browser). I would not advise hacking the plenum and patching with tape; even so, there is a bracket behind the center stack that would have to be cut and patched. However, I would recommend HeaterTreater doors. They are costly, but the last ones you'll buy.

    Regardless if you pay to have it done or DIY, do consider changing out the heater and evaporator cores while everything is open. You'll have to disconnect A/C and heater lines to remove the plenum, anyway. There are plenty of tutorials here and on YT if you want to try.
     

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