A/c only works through far passenger side vent. question is, is there a blend door on driver side to fix this.2000 1500 5.7 express conversion van

check these sites......

https://www.google.com/search?q=2003+Dodge+Caravan+Grand+Sport+blowing+heat+on+driver+side+vent

Good Luck!

Blend doors not working properly.

I would talk to a dealer or two.
You could have a damaged heater box or blend door. The blend doors direct air thru the heater core and the vents.
There was a recall for some blend doors on some Jeep models.
You may have to contact factory customer service to get it fixed.

Usually a blend door problem, either the control or the blend door itself.

2004 Chevrolet express 3500 does not have A filter for the cab or a filter on the incoming air that comes in through the area behind the hood in the center of the van. You can see the vent intake or vacuum operated blending door if you look through the plastic screen part of this trim piece with a flashlight it is down and to the left. My Xpress 3500 Cutaway has a trail light motorhome attached I'm assuming that this is also true for the 2500 van. I found this out the hard way this area got filled up with sand and leaves there's a drain at the bottom and it was clogged the blending door or vent door allowed the sand leaves to go directly into the blower motor and then next the heater core this all had to be washed out and the heater core sucked clean with a vacuum since it is nearly impossible to access it through the passenger side of the cab I removed the blower motor, cleaned that and then used a vacuum with an attached piece of PVC pipe three-quarter inch and a 90 on the end and carefully put it through the box where the blower was and into the side where you can see the heater core itself.. the only thing I was able to do from the passenger side was pull the cover down and out exposing the ac coil enough to blow compressed air through it back towards the heater core . If I'm not mistaken after you remove the screws holding this pice on the passenger side below the dashboard , where a glove box would of been there are screws that are not accessible you are directed to cut the top side seam to remove it . This I found from reading the instructions for replacing the
heater core ,I'm hoping to find some sort of filter offered to fix the intake, if not I think a piece of washable filter material cut accordingly and placed in front of the vaccume actuated blending /vent door , the 1" thick green or blue hvac washable material is what I am referring to . You would need to take the windshield wipers off and the plastic piece below that spans most of the area between the back of the hood and the bottom of the windshield you could put a pice ofthe washable filter material here in front of the vent door . As for the interior cabin filter I'm hoping some one makes in

Does your van have seperate controls for driver and passenger temperature settings? If so the most likely cause is a broken actuator or broken passenger blend door. Unfortunately, the only way to repair a broken blend door is to remove the dash and the HVAC assembly.

Blend door mixes hot and cold, not a distribution control. Look for loose or dislodged vac lines... Heater designed to fail in defrost mode.

There are two blend doors with actuators in models with separate controls for driver and passenger in the HVAC unit. Apparently the driver's blend door is broken/jammed, or the actuator is not working. You'd need to check a service manual to determine how hard it is to get to and repair the driver's blend door.

Sounds like a Blend door issue, but could be the controller switch, Test ALL modes of operation to see what works and what does not. That should narrow it down a bit. The Blend doors are flap/ doors that regulate air flow, newer vehicles are plastic - electric assemblies ...prone to failure. Any clicking or thumping noises during switching modes and on-off suggest a bad Blend door. Hope that helps...good luck

It is part of the heater box below dash on passenger side of van