Vacuum Lines for Climate Control

Thanks for the info! This truck has dual slider knob temperature control for the A/C, one for driver and one for passenger. When /AC is on, cold air only comes from driver side (yeah!) But it's warm on the passenger side regardless of the position of the slider knob. I am thinking its a blend door problem, but I don't have ability to remove whole dash. I attempted to remove the panel around the radio to see if I could check the slider potentiometer but was not successful. I also thought if I could remove the panel and if I could reach the door, I could tie it in the open position.

I think the mode selector is not working as I only get air from the top vents but better than no air at all.

Thanks for the help!

Hi,
Thank you very much for the diagrams. This appears to be a quite a long job and requires removing the dash and ac and heater lines. I found these videos which does a good job of showing what has to be done:

https://www.youtube.com/watch?v=dBAtCnIxC2A
https://www.youtube.com/watch?v=_sRvLSDALLc

I guess if you are going this far, you should replace all the doors, given the age of the truck. Usually all hinges on the door are brittle and the foam sealing has rotted away.

Here is a company who makes high quality replacements:
https://www.dieselpowerproducts.com/p-blend-door-usa-complete-hvac-repair-kit-03-09-ram?variant_id=21240&%3Fcampaignid=380196658&adgroupid=1231453211297606&creative&matchtype=e&network=o&device=c&keyword&msclkid=3add30c481fc170ea0625262cc076add

I guess i will defer this project until I get all the parts and have a long weekend.

Joe, thanks for all the help! You guys provide a valuable service for all us DIY guys who are struggling to understand these complicated auto subsystems!

I'm very old school too, growing up on 60s-70s V8's, mostly small block Chevrolets and Fords. Things that I don't like today is when you lean over the engine nowadays, you cannot see that ground! I cringe whenever I drop a bolt or socket and I don't hear it hitting the ground! Then getting a magnet that sticks to everything as you try to snake it down into the abyss. Along the same line is that I need help from guys like you just to find parts and components, especially sensors! Then even after finding them, I have to remove 2-3 other things to get to it. Just too many darn hoses and wires running all over the place! The car systems are just getting too complicated, and I have trouble figuring out what all those three letter acronyms stand for much less what and how they work. It is getting very nearly to the point where I have to say "uncle" (I have a Prius!). The PCMs and TCMs and their scanners are amazing, though. Kinda fun wading through all the menus and seeing what they do, even though I haven't a clue on many of them. Again, thanks a lot for all the help!

Yep, I feel your pain. I wish aspiring auto engineers' curriculum would include a semester of hands-on practical repair experience at a dealer service shop. I remember seeing a V8 Porsche needing the front tires and splash guards removed just to change plugs. I also saw where replacing knock sensors required the whole top end of a V6 Lexus to be removed.
Take care and thanks for all you guys do!