Any ideas on how to fix my Park Avenue climate control issues? (passenger side only pumps out heat).?

I have an older Park Avenue with dual climate control and the heater/AC isn't working properly. The driver's side will blow heat/AC/vent, but the passenger side will only blow heat (even if we change the climate control from the passenger controls). Does anyone know whats wrong?Any ideas on how to fix my Park Avenue climate control issues? (passenger side only pumps out heat).?
You have a hole in a vacuum line somewhere, or one has came loose, the only way to find it is to take your instrument panel cover off, and pull out the climate control, and try to trace it down...look for a hissing sound. This happened to me on my 1988 Chrysler New Yorker, The vacuum hose had pulled loose from the back of the Climate Control, Good Luck!Any ideas on how to fix my Park Avenue climate control issues? (passenger side only pumps out heat).?
Your ac has 2 doors under there that control how much hot air and cold air is blowing one for each side. The acuater that controls one of those must have gone out. have to remove the dash to get at it. Its about 3-4hours of work. Probably cost about $500-$1000 to fix.. If you want to try and fix it your self go to the dealer and get a factory sevice manual. They cost about $100+ but gives you all the info how to remove the dash and find what is causing the problem. Probably just be easier to take it to a shop if your not experinced with working on cars.

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