New Perspectives on HVAC Diagnosis

Hanging out in the hall after lunch at the MACS Training Event, a young man wearing shop clothes approached Richard Sheffield, introduced himself as Ron and said, “Somebody told me about your HVAC diagnostics class this morning and said I should attend the repeat class this afternoon. I’d like to know more; why I should attend yours and not the other one I had planned? What makes your class so good and what will I learn there that I’ll use when I go back to the shop?”

Richard replied, “It’s good to meet you Ron, and you have asked the right questions. I teach based on my 40-some years of experience, and I know how to make certain that what I teach is verified in accredited technical literature. I am also a member of SAE, so I find and use information provided by the engineers who build A/C systems, making sure my class is technically accurate. You need to know how a system works to diagnose and repair it correctly. Your diagnostics and procedures must be fast and accurate to make a profit. In my class you will learn the science of how it works, and you’ll learn how to focus on exactly what is needed to do a successful repair. You will also learn how to sell the repair to your customer.”

New Perspectives on HVAC Diagnosis is just one of the training seminars that will be presented at the 2014 MACS Training Event and Trade Show in New Orleans, January 16 – 18. This is the biggest MACS training event of the year, focusing primarily on HVAC and engine cooling in passenger cars, heavy duty and off-road vehicles and hybrid/electric vehicles. But that’s not the entire program. Other presentations will focus on advanced diagnostic techniques, business/shop management, and updates on new regulations and technology. There will also be a Section 609 Technician Certification class that includes information on R-1234yf and concludes with the certification test. And we’ll present the results of the 2013 MACS Field Service Survey. If you arrive early enough, there’s the annual golf tournament on Wednesday at TPC Louisiana (, and the party continues that night at New Orleans’ Mid City Lanes Rock’n’Bowl (

The 34th annual Mobile Air Conditioning Society (MACS) Worldwide Training Conference and Trade Show, Power UP  will take place January 16-18 2014 at the Sheraton New Orleans. Richard Sheffield’s class is scheduled for Thursday morning and is repeated on Thursday afternoon. Go here to see the whole schedule and to register.

The Mobile Air Conditioning Society’s blog has been honored as the best business to business blog in the Automotive Aftermarket by the Automotive Communications Awards and the Car Care Council Women’s Board!

When having your mobile A/C system professionally serviced, insist on proper repair procedures and quality replacement parts. Insist on recovery and recycling so that refrigerant can be reused and not released into the atmosphere.

If you’re a service professional and not a MACS member yet, you should be, for more information.

You can E-mail us at . To locate a Mobile Air Conditioning Society member repair shop in your area. Click here  to find out more about your car’s mobile A/C and engine cooling system.


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.
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