No cold air from the ac in my 1989 toyota camry seems to have stopped blowing cold air how can I recharge the ac system myself?

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Are you sure that is the problem?? Other things can cause this. Have the pressures checked first to see if the charge has leaked out, then you must find the leak. Also you have R12 in this system, R12 is no longer produced so you must covert the system to the newer R134 refrigerant, this takes a special kit being installed. So I guess the answer here is not you can't do this at home. The whole job will run about $1000.00
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