Had my mechanic friend take a look at my A/C on my 1991 240 wagon cause it is not blowing cool air, he informed me that my A/C system was never been converted to accept the newer refrigerant that is used now and to convert it would be about $200, he said it would be best to test it with the old refrigerant befor converting but he wasn't sure if it was still available or if there is a suitable replacement so it could be tested, so the question is can get something to see if it's working correctly befor I go and spend $200 and find out it's leaking or not working, thanks in advance for your input
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