A/C mostly blowing through floor vent very little through dash vents?

2001 DODGE RAM
259,000 MILES • 3.9L • V6 • 2WD • MANUAL
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JEFF HULL
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I have a broke what I believe is the mode door that is visible from the floor board on the passenger side when laying on your back looking up at the HVAC. See pic. I need to know how to replace that door with out pulling the dash.
Thanks,
J
Sep 9, 2025 at 4:09 AM
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STRAILER
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I don't think the actuator is the problem, this is a vacuum operated system thank defaults to the position you are describing when the system losses vacuum, I would lift the hood and check the small plastic vacuum tube for the engine, to the reservoir and to the firewall, this i normally where it brakes. Please use this guide to help fix it:

https://www.2carpros.com/articles/air-vents-stay-in-the-defrost-position

Please go over this guide and get back to us.
Sep 9, 2025 at 5:13 PM