The MACS Service Report is a valuable MACS member benefit. Published nine times annually for dues-paying MACS members, MACS Service Report is an in-depth technical newsletter.

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I conducted my first A/C clinic in 1991 which of course was 30 years ago. That was right along the time when things were getting geared up for the transition from R-12 to R-134a and was a very interesting period.

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