MACS Mobile A/C Best Practices Webinar: A Three-Part Series

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Join the Mobile Air Conditioning Society (MACS) Worldwide, the industry leader in mobile A/C service training for an information-packed, three-part webinar series: MACS Mobile A/C Best Practices. 

MACS has taken our industry-standard mobile A/C training seminar and broken it down into three core components: 

How mobile A/C works 
Testing and troubleshooting
Best Practice repair methods 

Part 1: A/C components and operation

Tuesday, June 7, 2016 4pm EDT

Just what exactly is air conditioning? How does it work? What key components are involved? What role does each of them play? Part one of the webinar will feature Steve Schaeber, MACS manager of service training, along with special guest Tim Iezzi, shop owner and lead technician at Iezzi's Auto Service, an A/C specialty shop and MACS member located in Reading, PA. The webinar will cover:

What is air conditioning?

Components and Operation:

1. Compressor
2. Condenser

  • 3/8" Tube & Fin
  • Serpentine
  • Parallel Flow
  • Micro-Tube
  • How to determine restriction
  • Temp Testing / Thermocouple / Infrared

 3. Receiver / Dryer
4. TXV
5. Evaporator

  • Tube & Fin Evaporator
  • Serpentine
  • Parallel Flow
  • Plate & Fin Parallel Flow
  • Ejector Cycle System Evaporator

6. Orifice Tube
7. Accumulator

  • Accumulator in operation
  • Important items
  • Testing OT system evaporator

Part 2: System troubleshooting and performance testing

Tuesday, June 14th, 2016 at 4PM EDT 

Learn the first thing to do when your customer says, "My A/C is blowing warm.”  What tools and equipment do you need to quickly determine the cause of poor A/C performance? The webinar will be hosted by Steve Schaeber, MACS manager of service training, along with an expert guest.  Learn how to verify and duplicate the customer’s concern:

  • Using a thermometer to measure outlet temp
  • Temperature / Pressure Drop relationship for diagnostics
  • High head pressures: diagnostic tips
  • Air flow issues
  • Fan clutch diagnosis
  • Humidity based performance testing

Part 3: Best practices repair methods

Tuesday, June 21st, 2016 at 4PM EDT

Along with summer's heat comes your customer's desire to stay cool behind the wheel. How you go about performing repairs on their vehicle determines not only how successful the job will turn out, but also how happy your customer will be with your service and how likely they are to return to your shop. MACS Steve Schaeber along with a guest expert will discuss:

  • A/C Compressor replacement & diagnosis
  • What is the complete repair?
  • Reasons for compressor failure
  • Leak detection
  • Electronic leak detectors
  • UV Dye leak detection
  • The importance of accurate charging
  • Reasons for incorrect charge
  • How incorrect charge affects system performance
  • Proper equipment maintenance
  • Refrigerant identification
  • Why do we evacuate A/C systems?
  • What happens when you leave refrigerant in a system?
  • Oil type, viscosity and amount
  • Oil balancing
  • Filters & flushing
  • Compressor clutches
  • Clutch circuit voltage drop test

Registration is FREE for MACS members, but they must register. There is a $40 registration fee for non-members. Register now at or contact the MACS office at 215-631-7020 to sign up today!

Since 1981, the Mobile Air Conditioning Society (MACS) Worldwide has been the advocate for service and repair owners, distributors, manufacturers and educators making their living in the total vehicle climate and thermal management industry. 

MACS Worldwide empowers members to grow their businesses and delivers tangible member benefits through industry advocacy with government regulators and by providing accurate, unbiased training information, training products, training curriculum and money-saving affinity member services. MACS has assisted more than 1-million technicians to comply with the 1990 Clean Air Act requirements for certification in refrigerant recovery and recycling to protect the environment. 

To learn more about MACS Worldwide visit our website at The MACS 2017 Training Event and Trade Show, Mobile A/C: Global Service Horizons will take place February 15-18 at the Anaheim Marriott in Anaheim, CA.

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