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Caveman to Mr. Cool

February 18, 2021

Over 300,000 years ago, modern man began walking the earth relying heavily on his five senses-- especially sight – to hunt, find joy, and avoid danger. In 1914, Garrett Morgan, who decided it was important to protect man’s eyes during hazardous situations, developed what we know today as ‘safety’ glasses.
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Fix it correctly the first time

February 15, 2021

A cooling system classroom lesson By Christopher J. Holley, MACS Contributing Editor A 2017 Accord with an overheating 2.4L engine arrived at our college lab. The customer had a limited...
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A Change in Temperature

February 10, 2021

Using a contact thermometer, they quickly discovered 50° on the suction line at the expansion valve, and down at the compressor it read 96°. Along any length of hose or tube, there should be very little change in temperature.
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Compressor Oil: When is it enough?

February 9, 2021

But how do we know that a system has the correct amount in it to start with?
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MACS Board of Directors Elects 2021 Officers

February 8, 2021

The board of directors of the Mobile Air Climate Systems Association (MACS) met virtually Friday, February 5, 2021, and elected officers for the year. Andy Fiffick of Rad Air Complete...
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Stop by for a visit

February 5, 2021

Visit MACS at
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Doing the repair right

February 4, 2021

By Richard Hawkins, MACS Contributor The focus in the two previous weeks articles on the Chevy Tahoe was on what went wrong and what should have been done to correct...
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The beginning of a New year, new MACS!

February 1, 2021

The Mobile Air Conditioning Society has rebranded to become the Mobile Air Climate Systems Association (MACS). During a year-long project, the MACS board and staff worked with the Blue Door...
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Tales from the helpline: When they don’t know, what they don’t know!

January 26, 2021

By Richard Hawkins, MACS Technical Contributor Last week, my topic of discussion for the MACS blog was a tech call about an A/C system which was plagued by a huge...
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MACS announces new 2021 Training Event and Trade Show Dates

January 25, 2021

The MACS 2021 Training Event and Trade Show will take place Thursday, September 30 through Saturday, October 2, 2021 at the Rosen Centre Hotel and Convention Center in Orlando, Florida....
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How much compressor oil is too much?

January 19, 2021

By Richard Hawkins, MACS Technical Contributor A lot of interesting calls are encountered when working on an A/C tech help line and a large percentage of them involve lubrication issues...
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Let me tell you a story…

January 12, 2021

By Richard Hawkins, MACS Contributor Editor’s note: Longtime mobile A/C industry professional Richard Hawkins joins the MACS editorial team as a regular blog contributor. Check in every Tuesday for Richard’s...
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MACS 2021 Board Election Results

January 6, 2021

The results of MACS board of directors election are in. The following members were elected for a two-year term, Andy Fiffick of Rad Air Complete Car Care of Cleveland, OH...
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MACS to reschedule the 2021 Training Event and Trade Show

December 17, 2020

Due to the circumstances of the pandemic and out of an abundance of caution for the safety of our attendees and staff, the MACS board of directors has decided to...
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OSHA and HazCom citations

December 14, 2020

By Charles Ayers, CCAR By the time you read this, the Occupation Safety and Health Administration (OSHA) will have released its “Top 10 Most Frequently Cited” list for fiscal year...
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HEVs and EVs still seeking best solution for HVAC

December 10, 2020

By Keith Leonard Another summer season has gone by while being unavailable for many activities usually enjoyed by almost all of us. The cover is back on my pool. While...
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Understanding data lines Part II

December 2, 2020

By Larry Turay Part I of understanding data lines was in the last issue, coverering data line structure and communications. Part II will cover troubleshooting and diagnoses of the J1587/1708...
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Safety Alert: Online Sales of Cool Penguin F-12

November 23, 2020

The United States Environmental Protection Agency (EPA) recently identified online sales of a product marketed as “Cool Penguin F-12” for use in motor vehicle air conditioners (MVACs). While the product...
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Celebrating the 30th anniversary of the clean air act

November 18, 2020

By Steve Schaeber, MACS manager of service training It was 2:30 in the afternoon on Friday, November 15, 1991. politicians and media met in the East Room at the White...
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Disinfecting of vehicles during COVID-19

November 10, 2020

By Ward Atkinson, MACS Technical Advisor, & Bill Hill, GM Retired Recent comments from government agencies on the COVID-19 virus issue indicate that even when a vaccine is available, our...
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Proceeding with caution

November 6, 2020

As essential businesses, most of us have been up and running through the outset of the COVID-19 pandemic, continuing through today, eight months later. We have adapted to the new...
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Modern cabin heating

November 2, 2020

By Frank Tonon, Qualification and training director, CPA Montreal Cabin heating through the yearsThe evolution of climate control in the past century has gone through several changes. From heated stones,...
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How do I obtain a copy of my MACS or IMACA Section 609 credentials?

October 22, 2020

Section 609 certification credentials are good for life. This means they do not expire. If you were Section 609 certified and obtained your credentials from MACS or IMACA and have...
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Hazmats: Why should I care?

September 21, 2020

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...
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Bringing in business in tough times

September 11, 2020

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...
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Back to basics

September 9, 2020

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...
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Understanding data lines (Part I)

September 8, 2020

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...
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Are you a diagnostic detective?

September 3, 2020

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:...
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Spend some time with MACS president and coo Elvis Hoffpauir

July 24, 2020

Hello, and Welcome to MACS Worldwide’s YouTube Channel. We’re glad you’re here! Elvis Hoffpauir Pioneer Experience MACS History! Elvis Hoffpauir, MACS president and chief operating officer, was presented with a...
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Does your business have a social media policy?

July 21, 2020

If the last few months have taught us anything, it’s that without clear-cut policies in place, our world can quickly devolve into a chaotic spin. From extended personnel leave to...
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What is MACS membership? Why should I join?

July 10, 2020

Membership in the Mobile  Air Conditioning Society (MACS) Worldwide means you pay a fee annually to receive all of our publications and  benefits, such as our Mobile A/C Diagnostics App,...
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MACS Live Chat (Richard Hawkins and Steve Schaeber discuss Service Port Location)

July 7, 2020

This live chat features Richard Hawkins, A/C Tech line specialist and MACS technical contributor. Like many of you are during this Coronavirus Pandemic, all of us here on the MACS...
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Name That Hybrid Water Pump

June 29, 2020

By Dave Hobbs, MACS Technical Correspondent While virtually every HEV (hybrid electric vehicle) has an ICE (internal combustion engine) along with one or more high voltage electric motors, not every...
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Meet MACS Member Joey Rosato of Texas Truck A/C

June 17, 2020

Joey Rosato is second-generation and Director of Marketing for family-run Texas Truck A/C in Dallas, TX. Joey tells us, “It all started in 1996, when Nick Rosato (Joey’s Dad) set...
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MACS Live Chat (John Duerr & Steve Schaeber discuss A/C Leak Detection Tracer dye & COVID-19 in NYC)

May 28, 2020

Hi everyone, and welcome to another MACS Live Chat, hosted by Steve Schaeber, manager of service training and technical editor for MACS publications like ACtion Magazine and the MSR (MACS...
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MACS talks to GDP’s Julian Hentze about mobile A/C parts, repair and more!

May 7, 2020

MACS Live Chat (Julian Hentze and Steve Schaeber discuss COVID-19, GPD and the Mobile A/C industry) Hello, and Welcome to MACS Worldwide’s YouTube Channel. We’re glad you’re here! Hi everyone,...
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Stop complaining about the technician shortage…

April 8, 2020

…and DO SOMETHING ABOUT IT! By Elvis Hoffpauir C.O.O. MACS Worldwide That was the principal message from Peter Meier, Director of Training at Motor Age. Peter, along with MACS Technical...
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Helpful tactics to minimize the spread of Covid-19 in your service and repair shop

April 7, 2020

By Bill Snow, Radair Complete Car Care, Cleveland, OH With today’s concern about being exposed to COVID-19 shop owners need to take additional steps to protect their team members and...
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How do I replace my MACS Section 609 credentials?

April 2, 2020

If you obtained your Section 609 certification credentials from IMACA or the Mobile Air Conditioning Society (MACS) Worldwide they can be replaced for $10. Visit this link on the MACS...
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Join other automotive professionals at MACS Trade Show

September 30, 2021

Join industry leaders and colleagues for the MACS 2021 Training Event and Trade Show. Drawing upon decades of experience, the new MACS brand will be launched live at the trade show, which is the leading event in the industry. Our revamped brand will help MACS better serve the needs of industry professionals.
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Section 609 Certification Prep Webinar & Test

March 10, 2021

Join the Mobile Air Conditioning Society (MACS) Worldwide for a our Section 609 test prep webinar for training and certification. The webinar will take approximately 90 minutes. At the end...
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Proper compressor draining and filling procedures

March 2, 2021

A different procedure is required on a lot of other compressors and based on my tech line experience: a huge number of technicians are not aware of this.
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Learn all about electric cooling fan analytics

March 1, 2021

Learn all about electric cooling fan analytics
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“Balancing” oil balancing

February 23, 2021

What should we do if performing an oil balance and only 1/4 oz of oil drains from the original compressor
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Section 609 Certification Prep Webinar & Test

February 22, 2021

Join the MACS Mobile Air Climate Systems Association for a our Section 609 test prep webinar for training and certification. The webinar will take approximately 90 minutes. At the end...
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Let everyone know you are Section 609 certified

February 22, 2021

New Section 609 work t-shirts in black featuring the new MACS logo.
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