Checked the 2 actuators ( replaced 1) on passenger side and check the 1 one the driver side
SOURCE: passenger side blows hot air when front control set to Air
you cant adjust it ,this requires the dealers computer to re set it,or a phyiscal control has packed up like a vacumn pipe has split where it pushes onto the valve that controls the flap in the heater unit.
SOURCE: 2004 Dodge Ram 2500 air conditioning
It sounds like your electronic vent actuator has gone bad, it's common to go bad and may need to be replaced. There are tinny gears that wear out and the vent actuator stops working. You can try this, turn the radio off first so you don't have to enter the reset code to activate your radio. Disconnect the battery for 30 seconds and reconnect it, if the actuator has lost it's base line and stuck in the open heat position, this will reset it, just make sure the setting is to cold and off before disconnecting and reconnecting the battery. If this does not work, then it's a bad actuator and Auto Zone should have the part you need and will have the step by step instructions for you to the job you self, I believe the dealer is a $415,00 repair cost for this. Good luck and keep me posted.
SOURCE: air conditioning blows cold on drivers side but
dodge has dual blend door actuators on the air box. you have to pull the dash board assembly out to access the passenger side door actuator. it calls for 5.8 hours to do this job. you also have to evacuate and recharge the ac system.
SOURCE: Heater in 2003 Dodge Ram 1500 blow cold air out of
Not sure about your dodge, but on hondas there is a lever under the driver side vent to allow fresh(outside air) when its cold out, it will be cold, even with the heat on inside, so check to see if your has that lever somewhere on that side...hope that helps
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