Question about 2002 Dodge Ram 3500 Truck

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1995 Dodge diesel. Heater fan runs but no air flow. Vacuum okay

Checked vacuum at mode switch = 20 inches. Pump supplies to 25 inches vacuum.Tried using a portable vacuum pump that goes to 26 inches vacuum but still no air flow. Recirc damper opens okay. Fan runs okay. No air flow comes from any port; floor, panel, defrost. I even tried vacuum at the mode vacuum hoses; still nothing. How can I get at defrost actuator without removing heater system from cab?

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Two actuators can be accessed (enough to move them) without removing it. One is on the bottom of the HVAC unit on top of the trands hump, you will probably have to remove the airbag module and cover to get to it. The other one is on the driver's side of the HVAC unit about half way up. Remove the driver's side knee bolster and you should be able to see it.

Posted on May 20, 2009

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