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. www.macsw.org

Will V2V Affect A/C?


By Steve Schaeber, MACS Technical Editor The U.S. Department of Transportation’s (DOT) National Highway Traffic Safety Administration (NHTSA) recently released an advance notice of proposed rule making (ANPRM) and a supporting comprehensive research report on vehicle-to-vehicle (V2V) communications technology. The … Continue reading

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One of those A/C things


One of the problems every shop faces – because customers don’t realize what’s normal and what isn’t – is how a system works. When the 2001 model year small GM SUVs were introduced (Chevy Blazer S-10, GMC Jimmy and Olds … Continue reading

Posted in Automotive Aftermarket, Automotive training, Electrical/Electronic, Mobile Air Conditioning, Refrigerants, Uncategorized | Tagged , , , , , , , , | Leave a comment

EU issues questions and answers on refrigerants used in MACS systems


EUROPEAN COMMISSION Refrigerants used in mobile air condition systems (MAC) Questions & Answers 25.09.2014 The Commission opened the infringement procedure in January 2014; why did it decide to send now a reasoned opinion? The German government submitted its comments to … Continue reading

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Better check the heater


Happy Fall! By Steve Schaeber, MACS Technical Editor It’s one of those cold mornings, (like the ones we’re starting to get here in the Philadelphia area), and maybe you go out to your car and find there’s no heat blowing … Continue reading

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Success in Seattle, MACS training class at Red Dot


MACS and MACS member RED DOT joined forces for a top shelf, high-value factory centered training event for the heavy duty and off-road vehicle mobile A/C technician this past Saturday, September 20th.  Acclaimed heavy duty A/C trainer, Blake Gordon of … Continue reading

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An R-1234yf update


By Steve Schaeber, MACS Technical Editor What will the new refrigerant be? That has been the most dynamic issue surrounding the future of the mobile A/C industry for the past few years. I recently had a conversation with MACS member … Continue reading

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Blower motor draw


By Steve Schaeber, MACS Technical Editor Recently, I posted to the MACS WordPress blog and covered a fuse issue on a 1999 Volkswagen Jetta. In response to my post, I received a comment from reader Bruce Caron. Here’s an excerpt … Continue reading

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A customer comes into my shop and says can you make me a hose?


As told to MACS Staff by Marks Air We received this story from MACS member Gordon Marks at Marks Air in Tampa, FL. Gordon is a frequent contributor to the MACS blog. A customer came in with his farm tractor … Continue reading

Posted in Automotive, Automotive Aftermarket, Automotive training, Electrical/Electronic, Mobile Air Conditioning | Tagged , , , , , , , , | 1 Comment

1999 VW Jetta – A/C Fuse # 25


By Steve Schaeber, MACS Technical Editor Technicians working on a third generation Jetta might find their A/C controls totally inop, including no blower fan operation amongst any of the fan speeds, and no operation of the A/C button or recirc … Continue reading

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What is the state of the mobile A/C industry?


State-of-the MAC Industry on Saturday, February 7, 2015 One of the programs during the 2015 MACS Training Event and Trade Show will feature  a luncheon presentation on Saturday,  February 7 with MACS technical advisor Ward Atkinson, who will explore the … Continue reading

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