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Caravans use R134 refrigerant. It is illegal in most states to intentionally vent refrigerant to the atmosphere. It must be vacuumed out with a pump and properly disposed of. Walmart carries a recharge kit. You must have the proper gauges and know how to use them to recharge your own system, otherwise you risk your health and your AC system. You must also make sure you are putting in the proper refrigerant, you can not mix different types. If you have AC problems, you should take your Caravan to a certified AC repair shop.
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