Author Archives: macsworldwide

About macsworldwide

Mobile Air Conditioning Society (MACS) Worldwide Founded in 1981, MACS is the leading non-profit trade association for the mobile air conditioning, heating and engine cooling system segment of the automotive aftermarket. Since 1991, MACS has assisted more than 600,000 technicians to comply with the 1990 U.S. EPA Clean Air Act requirements for certification in refrigerant recovery and recycling to protect the environment. The Mobile Air Conditioning Society (MACS) Worldwide’s mission is clear and focused--as the recognized global authority on mobile air conditioning and heat transfer industry issues.

2018 MACS Service Information Survey

The Mobile Air Conditioning Society (MACS) was organized to serve the mobile air conditioning industry. MACS’ charter and mission are communication and education. To achieve these goals, the Society has developed training programs and coordinated information between the air conditioning … Continue reading

Posted in #1234yf, Automotive Aftermarket, Automotive training, MACS Member, Mobile Air Conditioning, Refrigerants | Tagged , , , , , , , , | Leave a comment


By Steve Schaeber, MACS Technical Editor I think I stumbled upon one of the best days to travel by air: Labor Day. Short lines at security, and on the plane I even had the row to myself! In all the … Continue reading

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Escalating trade war

By Keith Leonard, Esquire The current administration has already imposed tariffs on imported steel and aluminum, sparking retaliatory tariffs imposed by multiple countries against goods imported from the United States. The tariffs imposed by the United States were couched as … Continue reading

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There’s no place like AGCO!

By Steve Schaeber, MACS Technical Editor Although the underlying principles behind what makes mobile A/C work are the same regardless of whether you’re working on a pickup truck, a tractor or the family van, there are differences that make working … Continue reading

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Do you know your HVAC components?

  The first part of any good under-hood inspection should include a label check. The labels below provide us with refrigerant charge specifications to correlate to the OE specifications found in service information. Notice the specifications for the R-1234yf charge … Continue reading

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The Shop Down Below

By Steve Schaeber, MACS Technical Editor Back in July I attended IMPACon18, the annual conference of the International Motor Press Association, of which I’m a member. This year it was hosted by Volvo at their newest dealership, Volvo Cars of … Continue reading

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Time counts!

By Angie Kilbourne Despite the awesome features available on social media, it can be a time sink — whether as part of a business’ marketing program or as a consumer. And even if you are doing it right, social media … Continue reading

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Installation and modification of A/C systems for US and imported vehicles

By Ward Atkinson Members have requested information regarding requirements that apply to vehicles produced by OEM vehicle manufacturers, commercial upfitters and independent A/C repair or service facilities that install or modify mobile A/C systems. All A/C refrigerants listed as acceptable, … Continue reading

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Leaks under vacuum

By Steve Schaeber A s OEMs continue improving their systems, technicians are seeing leaks more often attributed to the valve core located down inside the service port fitting, either on the high or low side of the system. Most of … Continue reading

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Tariffs a threat to auto repair industry

July 6, 2018 (Lansdale, PA) Today, 25 percent tariffs went into effect on a list of Chinese goods, and many MACS members have voiced concerns about the impact the tariffs will have on all sectors of our industry. In the … Continue reading

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