Category Archives: Uncategorized

Register now for MACS Section 609 webinar on November 12


Can’t attend a Section 609 class in person? Attend online with MACS on Wednesday, November 12 at 2pm. Can’t make it at 2pm the class will be recorded to view when you have time. Cost for the online Section 609 … Continue reading

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Registration is now open for MACS 2021Training Event and Trade Show


Registration is now open for ACcess, the MACS 41st annual Training Event and Trade Show to be held February 3-6, 2021 at the Rosen Centre Hotel, Orlando, FL. MACS is planning our 2021 Training Event with careful consideration to the … Continue reading

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Hazmats: Why should I care?


by Charlie Ayers Trivia question: what do R-134a, Lithium Ion batteries, air bag modules, and used fuel system components all have in common? Aside from the fact that these are all in-use in today’s vehicles, they are all also classified … Continue reading

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Today, September 16, is World Ozone Day!


On 19 December 1994, the United Nations General Assembly proclaimed 16 September the International Day for the Preservation of the Ozone Layer, commemorating the date, in 1987, on which the Montreal Protocol on Substances that Deplete the Ozone Layer was signed. States are invited … Continue reading

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It’s on! MACS 2021 Training Event and Trade Show!


MACS is planning our 2021 Training Event with careful consideration to the current pandemic and is including safety and security measures as we move forward to create a valuable training and networking experience. Why attend? The early deadline to reserve … Continue reading

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Bringing in business in tough times


By Angie Chabot, AAM As the world battles a pandemic, businesses, like yours, are battling to keep customers coming in the doors. Just when it seems that every penny must be spent wisely, it also is a prime time to … Continue reading

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Back to basics


by Steve Schaeber There is no doubt that when it starts getting hot outside, your shop gets slammed with customers asking for help with their A/C systems. Same thing happens here at MACS, except we get slammed with A/C tech … Continue reading

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Understanding data lines (Part I)


By Larry Turay Data lines and multiplexing have been with us in the heavy-duty world since 1990. The increased use of ABS, electronic ICUs, and automated transmissions to name a few, led the way that made the use of electronic … Continue reading

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Are you a diagnostic detective?


By Pam Oakes, SME automotive professional If you consider yourself a diagnostic detective see if you can solve this cooling system mystery before the end of the article! Cooling Corner: The mystery of the 2008 Dodge Charger Customers drive into … Continue reading

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The 2020 September/October Action magazine issue is out!


School bus A/C service and technology By Jerry Lemon, MACS Technical Correspondent School is back in session, to some extent anyway, in most parts of the country. Now our thoughts turn to servicing the air conditioning on the buses, which … Continue reading

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