Avoiding Expansion Valve Woes (Part 1)
March 21, 2023
By Richard Hawkins On March 2nd, an article was published in this blog covering a class that was held at the recent MACS Training Event and Trade Show. The class...Read Article >
Deere allows farmers to repair their own equipment
January 22, 2023
by Steve Schaeber, MACS technical editor After years of debate, a memorandum of understanding (MOU) has been signed by the world’s largest farm machinery manufacturer. On January 8, 2023, Deere...Read Article >
Follow up on the 12/30/22 EPA virtual public hearing
January 12, 2023
By Steve Schaeber, MACS Technical Editor Let me start off by saying Happy New Year! to everyone, and here’s to a great 2023! Since many of you were on holiday...Read Article >
EPA proposes GWP limit for five MVAC subsectors
December 22, 2022
By Steve Schaeber, MACS Technical Editor The mobile air conditioning industry has, so far, used R-1234yf refrigerant primarily in passenger vehicles and light duty trucks. Although MACS has reported on...Read Article >
Too Many Compressors
December 20, 2022
The blog article published on November 8, 2022, focused on understanding the importance of knowing the precise location of service ports when faced with a challenging A/C diagnostic issue. It...Read Article >
Interior Heating Evolution
November 1, 2022
In the last 120 years, automotive passenger heating has evolved dramatically from open carriage-type automobiles with little occupant protection from the elements to complex electric vehicle (EV) heating, ventilation, and air conditioning (HVAC) systems.Read Article >
Electric Compressors, EV System Enhancements and Heat Pumps
October 26, 2022
EV and hybrid manufacturers are searching for every yard/meter of range they can squeeze out of their vehicles. In the race to get their newest offerings into the driveways of consumers, range is a major factor. HVAC can severely effect vehicle range, and engineers are doing everything possible to reduce the impact of this creature comfort/necessity.Read Article >
Staying RRR current
October 25, 2022
The refrigerant checked out fine. No contamination with other refrigerants and no air contamination. Their machine pulled 30 ounces out of that system.Read Article >
Plug into MACS EV Program
October 24, 2022
Plug into MACS EV Program. MACS is providing a robust electric vehicle training program at our 2023 Training Event and Trade Show.Read Article >
The Changing Serpentine Belt Drive World
October 20, 2022
Serpentine belt system diagnostics are important. How do we know if the belt, tensioner, or idlers are failing? What are the consequences to the accessories in the system if the belt, tensioner, and idlers are past their useful life span? Plus, where is technology taking us in the serpentine belt drive world? Learn the answers to these questions in this session.Read Article >
Refrigerant recovery and system diagnostics
October 19, 2022
That’s right. Two days later the customer called and said it was cooling terrible. I had him bring it back in and put the gauges on it and checked the vent temperature and it was running about 325 on the high side and about 45 on the low side and the vent temperature was about 55 as I indicated earlier. Of course, it was in the low 90’s that day.Read Article >
Airsept to display at MACS
October 17, 2022
Airsept to display at MACS Training Event and Trade Show. MACS training event will take place February 2-4, 2023, at the Gaylord Opryland Resort and Convention Center in Nashville, TN. Located in Atlanta, GA, Airsept has been an active member of MACS since 1997.Read Article >
