I had to replace the brushes on my 2000 Caravan alternator so I had to remove the serpentine belt. I was able to remove the belt by prying the idler pulley inwards to take of the pressure and slip it off so I think you should be able to do the same thing.
SOURCE: starter for dodge caravan 2000
DISCONNECT THE BATTERY, JACK UP AND SUPPORT YOUR CARAVAN. LYING ON YOUR BACK LOCATE THE STARTER WHICH IS ATTACHED TO THE ENGINE THROUGH THE BELL HOUSING .THERE ARE TWO 15 MILIMETER BOLTS THAT HOLDS THE STARTER ON . AFTER BREAKING THE BOLTS A 15MM WRENCH WOULD BE USEFUL.
SOURCE: 2000 Dodge Caravan air conditioner problems
heating and cooling fans are generally one and the same. changing freon doesn't always fix the problem... did you have the system pressure checked for leaks first.
Second determine if the vents are opening properly (switching from heat to cooling) basically when you change to cool it closes air access to the heater core.
Robert
SOURCE: How to replace serpentine belt for 2000 Dodge Grand Caravan?
Mine fell off twice so far once when going through snow and other was going through rainstorm had to use jack wrench to pry down and slip on belt which was hard to do and don't advise you to try. Ok the pulley directly under the alternator and in the middle of 3 other pulleys is the one that is the tensioner. To do this right use a 15 millimeter or 5/8 socket or open end wrench, the longer the handle the better so you can get good leverage maybe you have a pipe to slide over handle. There is a diagram of the way the belt goes on under the hood. I have a 2000 Dodge Grand Caravan
SOURCE: replace serpentine belt on 2004 dodge caravan
Hello
Here is a link for belt replacement
RD
http://www.autozone.com/addVehicleId,2945902/initialAction,repairGuide/shopping/repairGuide.htm?pageId=0900c152800b639e
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