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Discussion Starter #1
I have a 2003 RAM 2500 5.9L Cummins

It starts out blowing great, but after a while the air flow stops. You can still hear the blower and if you put your hand close to the vent you can still feel the cold air, but none comes out of the vent. This usually happens when driving on the highway at higher speeds. I replaced the blend door actuator located up underneath the blower motor on the passenger side underneath the glove box, and the blend door there appears to be working just fine.

Does anyone have any ideas of what else it could be?

Any advice or insight would be much appreciated.
 
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