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2nd Gen Ram Tech1994-2001 Rams: This section is for TECHNICAL discussions only, that involve the 1994 through 2001 Rams. For any non-tech discussions, please direct your attention to the "General discussion/NON-tech" sub sections.
First off I'm new to the form so bear with me if I don't get it just right. I have a 2001 Gen 2 2500 V10 issue with my AC is not blowing out the vents all the time it works sometimes but not all the time sometimes it'll just blow out on defrost sometimes I can get it to blow regular but then when I shut the engine off and start it up again it will just blow out defrost a friend of mine told me that it might be the mode actuator but I can find nothing online that says it has one so my question my first question is does it have a mode actuator second question is if it does not what else can I check I've heard vacuum leaks are possible but other than that I am stumped any help would be much appreciated
All the vents are vacuum controlled. The temp door is driven by an actuator, but, that ain't your problem. If there is insufficient vacuum, the vents default to defrost. A vacuum leak somewhere is likely.