More in common with an IT specialist

By Andy Fiffick

“Today’s technician has more in common with an IT specialist than he or she does with wrench turners of old.”

That observation by Peter Meier, director of training for Motor Age, seems particularly appropriate to me. In his column in the July 2016 issue of the journal he observed: “Today, the computing power of individual modules on a car rivals that of the laptop you use in the shop or at home. Instead of one module, there are dozens of modules on the car, making up multiple networks that control everything from engine management to how cool the cabin stays.”


Pete’s right, of course, and MACS gears its information and training for the vehicle climate and thermal management landscape as it exists today and will evo2016ac_09digitallve tomorrow.

I invite you to closely examine the educational and training program MACS has developed for its annual training event, scheduled Feb. 16 through 18 in Anaheim, California. We’ve
included the full program in this issue of ACTION.

MACS is fortunate to have the support of the leading technical specialists and trainers in the country. Their support makes it possible to pack a total of more than 30 hours of information, education and training into this three-day event, including a full day of training in Spanish.

Training sessions will focus on advanced diagnostic techniques, telematics and the expanding role of automotive refrigerant systems in supporting vehicle operation, as well as service and repair efficiency and accuracy. There will be two full days of training specific to both auto and light truck, and two days of training on heavy duty trucks, off-road and other specialty vehicles. Sandwiched between the training days is the opportunity to engage one-on-one with the industry’s leading manufacturers and suppliers, and examine the latest tools and equipment at the MACS trade show.

In addition to technical training, important insight will be offered on climate control and thermal management of alternate fuel vehicles, penetration in the fleet of R-1234yf refrigerant, regulatory developments and other factors and trends that will impact our businesses into the future.


As business people, we know that in addition to having the tools and expertise to serve our customers, there is another essential component to our success, and that revolves around our sales and marketing efforts. Just as the technical side of our business becomes more complex each day, so does the business side of our business. Having an online presence for our customers, understanding and making the most of social media, and all of the challenges of the digital age must be addressed to ensure our success.

With the latter in mind, MACS has implemented a new feature for 2017. We will provide free marketing and advertising consultations on the trade show floor on Friday, and will also conduct a panel discussion on marketing and management at lunch on Saturday during the training event.

After reviewing the enclosed program, you’ll want to attend the MACS annual event in 2017. It will be good for your business!

If you’re a service professional and not a MACS member yet, you should be!

Become a member and receive a monthly technical newsletter with information like what you’ve just read in this blog post visit 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.

Mobile A/C professionals should plan to attend MACS 2017 Training Event and Trade Show, February 15-18 at the Anaheim Marriott in Anaheim, CA.

Click here to see MACS current public training schedule.

The MACS website is located at

Posted in ACtion Magazine, Automotive, Automotive training, MACS Training Event, Training, Uncategorized | Tagged , , , , , , , , , , , , , , , , , | Leave a comment

GMC hits the road with R-1234yf

By Steve Schaeber, MACS Technical Editor

It was during the general session meeting on Thursday morning at MACS 2016 Trade Show in Orlando that we first learned about GM’s intention to add several new vehicles to their lineup this year which use HFO-1234yf as an air conditioning refrigerant, and sure enough this summer we’re seeing quite a few on dealer lots. Earlier this month we stopped by at Bergey’s Buick GMC to check out their new R/R/R machine, and also learned more about the redesigned 2017 Acadia, the first GMC vehicle to be filled with the new refrigerant.


MACS had the opportunity to check out the new 2017 GMC Acadia at Bergey’s Buick GMC on September 6th.  Built on GM’s C1xx crossover platform, it’s shared with Cadillac for their 2017 XT5 (Crossover Touring 5).  GMC started selling the Acadia in 2006, and this version is their second generation crossover, which has been available since May 2016.


Standing with their new R-1234yf A/C machine is Andy Bednarczyk, service manager at Bergey’s Buick GMC in Franconia Township (Souderton), PA.

“We’ve had the new machine for a few weeks now, but no one’s had to use it yet,” remarked Scott Sowka, service technician at Bergey’s Buick GMC. “The new yf Acadias just arrived this summer, and in fact this one was just built in August!”


Sowka had this 2017 Acadia in the shop for a PDI service (pre-delivery inspection), giving MACS the chance to take a closer look.  At first glance, much of the A/C system looks similar to last year’s R-134a models, with the exception of the service ports, caps and A/C label.  Taking a closer look (but not measuring it), the new condenser looks HUGE as compared with previous models.


The redesigned 2017 GMC Acadia is the brand’s first to use the new R-1234yf refrigerant in a production vehicle.  Loaded with symbols, this A/C label (otherwise known as the “639 Label”) packs a lot of information into a small space, including the required refrigerant charge for these SUVs when built with either front-only or front and rear evaporators.  The label gets its moniker from the SAE J639 Standard which requires its use.

GM sources its A/C compressors from various manufacturers, and for the 2017 GMC Acadia they’re using a variable displacement model made by Denso. But there’s something unique on this compressor’s label that we’ve only just begun to see recently, and that’s a smiley face! Sure, we know the guys at Denso are quite helpful and friendly, but we thought there has to be something more to this cheerful icon than just trying to brighten a technician’s day. MACS spoke with Denso’s Brett Grover, one of the technical training specialists at DPAM and an A/C instructor at MACS training events, who explained that this happy image is a requirement specific to GM, which they use to signify compatibility with R-1234yf refrigerant.


Powering the 2017 Acadia’s A/C system, GM uses Denso’s 7SAS18H compressor, a 7 cylinder, variable displacement type that uses and electromagnetic clutch and displaces 180cc’s per revolution.  Note the smiley face on the compressor label, a mark unique to GM which indicates compatibility with yf refrigerant.

In keeping with their sales and service agreement, GM dealers are required to provide certain essential tools and service equipment for their technicians to properly diagnose and service their vehicles. When it comes to these new “yf cars,” one of the required tools is part number GE-50300. If it looks familiar to you, that’s because it’s an unmarked Robinair AC1234-6 machine. It doesn’t directly carry the Robinair brand on the outside, but turn on the power and you’ll see Robinair’s stylized name on several menu screens.


Robinair R/R/R machines are manufactured by Bosch Automotive Service Solutions at their factory in Owatonna, Minnesota.  We’ve seen them specially branded for certain car manufacturers before (check out the Toyota Tacoma R-1234yf blog at this link: ), but in this case its special branding is hidden in the machine’s own model number.  GE-50300-A is a giveaway that this is an SPX/Kent-Moore (now OTC/Bosch) tool, as it follows their long standing, alpha numeric tool numbering sequence and is in line with previous model # GE-48800, which is the SAE J2788 machine for use with R-134a refrigerant.  Kent-Moore is a name well known to GM service technicians, as it’s historically been the GM special service tool manufacturer.


The GE-50300-A refrigerant recovery, recycling and recharging station, certified to meet SAE Standard J2843, is designed to be used only with R-1234yf refrigerant.  This particular unit includes a built-in SAE J2927 refrigerant identifier, required as part of the J2843 Standard.

More information about Bergey’s Buick GMC can be found on their website. You can also find out more about the 2017 GMC Acadia by visiting and clicking on ACADIA.

Robinair’s website has more information about their R-1234yf shop equipment, but you can also see them at the 2017 MACS Training Event & Trade Show, being held February 15-18, 2017 at the Marriott hotel in Anaheim, California. Visit to get the details!

If you’re a service professional and not a MACS member yet, you should be!

Become a member and receive a monthly technical newsletter with information like what you’ve just read in this blog post visit 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.

Mobile A/C professionals should plan to attend MACS 2017 Training Event and Trade Show, February 15-18 at the Anaheim Marriott in Anaheim, CA.

Click here to see MACS current public training schedule.

The MACS website is located at


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A small Δ in airflow = A BIG impact on A/C performance

By Steve Schaeber, MACS manager of service training

Proper air flow across the heat exchangers in an air conditioning system is key to its being able to transfer heat efficiently. Problems with air flow can be caused by slow turning or inoperable fans, dirt and debris build up on evaporators, condensers and radiators, as well as missing or damaged foam insulation. It can also be caused by problems with air dams, scoops and fins. Poor airflow is a common undiagnosed cause of original compressor failure and comebacks following an A/C repair job.


Testing and inspecting these components for visual signs of blockage and damage should be one of the first steps taken when diagnosing A/C or engine cooling system performance issues. Reduced airflow through the condenser or radiator can result in premature compressor failure, poor A/C performance and engine/transmission overheating. Poor A/C performance after compressor replacement may not be associated with an airflow issue, especially when no obvious signs of engine overheating are evident. Therefore, a thorough evaluation of the system should be performed.



If you’re a service professional and not a MACS member yet, you should be!

Become a member and receive a monthly technical newsletter with information like what you’ve just read in this blog post visit 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.

Mobile A/C professionals should plan to attend MACS 2017 Training Event and Trade Show, February 15-18 at the Anaheim Marriott in Anaheim, CA.

Click here to see MACS current public training schedule.

The MACS website is located at



Posted in MACS Member, Mobile Air Conditioning, Uncategorized | Tagged , , , , , , , , , , , , , , , , , , | Leave a comment

The latest on R-1234yf from MACS member Honeywell

By Steve Schaeber, MACS Manager of Service Training

Rick Winick, Business Director, leads the Honeywell Fluorine Products Automotive Refrigerants segment. Rick and his team work to ensure global automotive OEM and aftermarket customers can turn to Honeywell as their long-term supplier to meet their need for near drop-in, low-global-warming-potential (LGWP) refrigerants. Under Rick’s direction, the Automotive Refrigerants team collaborates with customers throughout the implementation process—from beginning to end—to be certain the refrigerants Honeywell develops can be easily and economically adapted by global customers, allowing vehicle and equipment manufacturers to meet current and future environmental regulations.

MACS recently had another opportunity to ask Honeywell a few questions, and we’re sharing the conversation with our members. I asked Rick about the ongoing rollout of R-1234yf refrigerant, and what’s going on with regulations and Heavy Duty A/C.



  1. MACS: Are small cans of R-1234yf being manufactured and/or sold at this time? Has a submission been made / approved by US EPA regarding a unique fitting for small cans of R-1234yf?

Honeywell: No, small cans have not yet been approved by the EPA. Specifically, a SNAP application needs to be submitted and approved.


  1. MACS: When produced, will small cans of R-1234yf be equipped with self-sealing valves?

Honeywell: The EPA has addressed this as a part of the proposed Section 608 modifications. We believe that any application for the small cans should be aligned with the EPA’s requirements and will work to ensure Solstice yf complies with those requirements, while providing optimal performance for customers.


  1. MACS: What is Honeywell’s position regarding EPA’s proposed rule to extend the ODS sales restriction to include all mobile A/C refrigerants?


Honeywell: Honeywell supports efforts to reduce emissions of all refrigerants through training and proper services practices.


  1. MACS: What special considerations must be made by shops regarding the storage of a single cylinder of R-1234yf refrigerant?


Honeywell: NFPA (the National Fire Protection Association) has recommended practices for storing flammable compressed gases. Local regulations generally adopt the NFPA recommended practices. Some, however, may implement more stringent standards. All businesses storing or handling R-1234yf should consult a local regulatory expert on facility design and acceptable practices related to the occupancy class limitations for their operations and businesses.


  1. MACS: Are there any further considerations necessary for the storage of more than one cylinder, such as a special storage cabinet?


Honeywell: The regulations are not generally related to the number of cylinders but rather the total volume stored in a specific area of the building. The total volume stored dictates the occupancy classification and the requirements. NFPA standards should be referenced along with local building codes.


  1. MACS: What concerns, if any, are associated with using R-134a in a vehicle originally designed to use R-1234yf? For example, what would happen if R-134a was used to “top off” a vehicle which already contains R-1234yf?


Honeywell: Vehicles and their A/C systems are optimized and validated with a specific refrigerant. Filling a system with a refrigerant different from the original can lead to a sub-optimal cooling performance, as well as potential incompatibilities with the materials, as the refrigerant/oil combination is optimized around the material system selected. Additionally, replacing a low-GWP refrigerant with a higher-GWP alternative is considered by the EPA to be tampering with an emissions control device and is in violation of the Clean Air Act. We strongly recommend that technicians and vehicle owners follow the refrigerant servicing recommendations listed in their vehicle owner’s manual.


  1. MACS: What progress has been made regarding the use of R-1234yf in medium-duty trucks (Classes 2b and 3)?Has EPA finalized their proposed rule regarding medium duty trucks?


Honeywell: The risk assessment evaluated for light duty vehicles is being expanded for use in the medium-duty truck classes 2b and 3. The rule is not yet finalized, but is being discussed by the EPA and has reached the comment phase. The EPA is optimistic that a regulation/CAFE credit system can be reached by the end of 2016.


  1. MACS: Going forward, are there any plans to approve the use of R-1234yf in larger vehicles (Class 4 and up)?


Honeywell: The use of R-1234yf in heavy duty vehicles is assumed to be the next phase after classes 2b and 3. Due to their different HVAC architectures and larger refrigerant charge sizes, however, this will require a new risk assessment to gauge the risk of R-1234yf in everyday use, consistent with the risk assessment conducted for light duty vehicles.


  1. MACS: Has Canada finalized their R-1234yf regulations?

Honeywell: In terms of environmental regulations, yes, yf is approved for import, sale and usage in Canada.


  1. MACS: Apparently hydrocarbon refrigerants are legal to sell in many parts of Canada. What if someone there decided to replace R-1234yf with a hydrocarbon refrigerant? Is that legal in Canada?


Honeywell: There are no specific laws regarding replacing one refrigerant with another. It is illegal to mix—or top off—two or more refrigerants in one system. In addition to the legal implications, this is a safety issue. Vehicles and their air conditioning systems are optimized and validated with a specific refrigerant. Filling a system with a refrigerant different from how it was originally filled can lead to a sub-optimal cooling performance. In addition, there could be incompatibilities with the materials, as the refrigerant/oil combination is optimized around the material system that was selected. Plus, there is the increased risk of using a more flammable hydrocarbon in a system that was designed for a mildly flammable A2L refrigerant.


  1. MACS: We’ve seen several vehicle models during the past few years with A/C hoses indicating compatibility with both R-134a and R-1234yf. Are major changes in hose design or construction required to make these hoses compatible with R-1234yf?


Honeywell: SAE standards are in place that require A/C hose manufacturers to validate their hoses for the intended refrigerant(s) and they must be marked to indicate which refrigerant(s) were used. Some hoses might meet validation standards for more than one refrigerant. One of the major differences between hoses for R-134a and hoses for R-1234yf are the charging ports. SAE standards dictate that the charge port fittings be different and unique for the different refrigerants.


  1. MACS: Are there concerns about technicians misinterpreting these hose markings to mean that these A/C systems can be filled with either R-134a or R-1234yf?


Honeywell: Each vehicle is clearly marked with an under-hood sticker showing refrigerant and oil has been used. The SAE implemented this standard years ago, requiring OEMs to place an easily visible sticker under the hood, listing the refrigerant required in the vehicle. It should be obvious to anyone repairing the A/C system which refrigerant should be used in the vehicle. Hose standards or markings are not currently—nor have they historically been—the indication used by technicians to determine the refrigerant used in the vehicle. In addition the charge ports in the vehicle are designed to be used with either one refrigerant or the other (1234yf or 134a). Hose markings are not a way to determine which refrigerant to use with the system.


Note: Keep in touch with MACS at to stay on top of the ever-changing world of mobile A/C!

Posted in #1234yf, MACS Training Event, Mobile Air Conditioning, Refrigerants | Tagged , , , , , , , , | Leave a comment

Insufficient A/C performance at idle

On some 2013 Chevrolet Sparks, the air conditioning duct temperature may be 10°F (5.6°C) warmer at idle, but is sufficient while driving .


Verify that the A/C pressures are within specifications at idle according to the A/C Performance Chart in the appropriate Service Information. See Figure 16. If A/C pressures and duct temperatures are not within specifications, perform the following:


  1. Verify the proper refrigerant level is in the A/C the system: 0.94 lbs (430 grams). If the refrigerant level is low, add GM-approved A/C dye to vehicles built before January 29, 2013, recharge the system to specification, evaluate, and perform an electronic and black light leak detection test. A/C dye began being added during assembly of the Spark at the plant on January 29, 2013.
  2. If pressures at idle and slightly above (increased by 200 RPM) are the within 10 PSI (69 kPa) of each other, do not attempt any repairs or replace any parts at this time. GM Engineering is working on a repair to address this condition.
  3. If the pressures are not within normal specifications at idle but become normal slightly above idle (for example, at idle the low side pressure is higher than normal, i.e. 60 PSI (414 kPa) at 72°F (22°C), and then when the engine RPM is raised higher, i.e. 1500 RPM, the low pressure drops to within spec, i.e. 40 PSI (276 kPa), this indicates an internal compressor seal condition and the A/C compressor will require replacement.If you are a service professional and not a MACS member yet, you should be!Become a member and receive a monthly technical newsletter with information like what you’ve just read in this blog post visit 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.

  4. Mobile A/C professionals should plan to attend MACS 2017 Training Event and Trade Show, February 15-18 at the Anaheim Marriott in Anaheim, CA.
  5. Click here to see MACS current public training schedule.

    The MACS website is located at

Posted in Automotive, Automotive Aftermarket, Hybrid, MACS Member, Mobile Air Conditioning, Refrigerants, Training, Uncategorized | Tagged , , , , , | Leave a comment

Denso uses A/C to alert drowsy drivers

By Steve Schaeber, MACS Technical Editor

The basic technology has been around for a while now, going back at least 10 years on Toyota and some luxury car brands such as Mercedes, Lexus and Volvo, but this new concept by Denso may become more commonplace if it proves to be useful in helping reduce accidents due to driver fatigue. Denso’s approach is a bit different than some others though, as this time they look to leverage their knowledge and experience in HVAC technology to help keep drivers alert and safe behind the wheel.

There’s no official name for the system yet (it’s currently still in the development stage), but it’s going to combine their already available DSM (Driver Status Monitor) system with the vehicle’s air conditioner. The basic idea is to send a blast of cold air towards the driver if the DSM detects fatigue, in an attempt to “wake them up” and keep their eyes on the road, while also suggesting it may be time to pull over for a break. Details on system operation have not yet been disclosed, but we can imagine the driver getting a few short blasts of cold air in the face if the system should detect erratic steering wheel movements, the car drifting out of the lane, or the driver’s eyes closing for long periods of time.

Denso’s current DSM system can monitor a driver’s face angle, eyelid closure, drowsiness level and head position using a vision system and image processing technology. If the system detects that a driver is getting tired and sleepy, it displays a warning message along with an audible chime. In the 2016 Lexus LS460 it’s called the Driver Monitor System (aka Driver Attention Monitor), part of their $6,500 Advanced Pre-Collision System Package, which not only includes the DMS, but also Lane Keep Assist, Pre-Collision System and all-speed Dynamic Radar Cruise Control. DMS is designed to alert the driver if a potential hazard is detected and the driver’s eyes are closed or face appears to be turned away. It can also operate the pre-collision braking system.

(Figure 1) 12_TV_ATTENTION-ASSIST_@2x (mercedes dash icon 082616)

Daimler introduced similar technology with Attention Assist in their 2010 E-class sedans. The driver information center displays the message, “Attention Assist: Drowsiness Detected” along with a coffee cup icon. Rather than use a camera system to monitor the driver’s face, Mercedes monitors position changes in the steering angle sensor among others to detect erratic inputs, indicating driver fatigue.

(Figure 2) img24c27b7106f81468c0a801e70040c061_1_--_--_VOICEpnghigh (volvo coffee cup icon 082616)

Volvo’s dashboard icon depicts a steamy cup of coffee, indicating it’s time to take a break. The Volvo S80 has had the DAC (Driver Alert Control) System since the 2009 model year.

(Figure 3) imged617e4e6bdea1d2c0a801e70114bc77_1_--_--_VOICEpnghigh (volvo)

The Driver Alert Control system used in the 2015 Volvo V40 can detect slowly deteriorating driving patterns. Intended to be used primarily on major roads, its onboard cameras supplied by Delphi detect lane markings painted on the highway and compare them with how the driver is controlling the steering wheel.

(Figure 4) Driver-Status-Monitor-99 (Denso)

Denso’s Driver Status Monitor is mounted just above the steering wheel (atop the steering column) on some Toyota and Lexus vehicles. It uses a camera with near infrared LEDs to monitor the driver’s face and integrates the ECU inside the sensor housing.

Even the most seasoned professional drivers are not immune to tiredness or fatigue, and most of us know that feeling you get after being behind the wheel for a long period of time. Today we’re seeing incredible technological change and advancement in vehicle safety systems that were unheard of even a decade ago, and I’m looking forward to see how far this technology can go!

Want to see a video of how Denso’s Driver Status Monitor works? Click this link to see Brandy Cooper from Denso Manufacturing in Athens, Tennessee as she demonstrates how the system sees your face behind the wheel.

Is there an amazing safety system in your own car or truck? Has it activated to assist you during your travels? Visit our website and share your story with MACS!

Posted in Automotive Aftermarket, Automotive training, Electrical/Electronic, MACS Member, Mobile Air Conditioning, Training | Tagged , , , , , , , , | Leave a comment

Hose is one of your most important components


September/October 2016 ACTION Magazine


The September/October 2016 issue of award-winning MACS ACTION Magazine is now ready for viewing! Everything you always wanted to know about mobile A/C hose applications but had no idea who to ask! Jam packed with must know information! MACS has contacted the experts to bring you the best technical content.

2017 Program

Included inside is a 16 page insert of the complete schedule for MACS 2017 Training Event and Trade Show.  Registration for MACS 2017 Event in Anaheim, CA is now open.

If you’re a service professional and not a MACS member yet, you should be!

Become a member and receive a monthly technical newsletter with information like what you’ve just read in this blog post visit 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.

Mobile A/C professionals should plan to attend MACS 2017 Training Event and Trade Show, February 15-18 at the Anaheim Marriott in Anaheim, CA.

Click here to see MACS current public training schedule.

The MACS website is located at


Posted in #1234yf, ACtion Magazine, Refrigerants, Training | Tagged , , , , , , , , , | Leave a comment

Registration is now open for MACS 2017 Training Event and Trade Show

 Registration is now open for the Mobile Air Conditioning Society (MACS) Worldwide 2017 Training Event and Trade Show to take place February 15-18 at the Anaheim Marriott, Anaheim, CA. The 2017 MACS Training Event theme is Mobile A/C: Global Service Horizons, exploring the new technologies influencing the role of mobile A/C systems in current and future vehicles.

2017 Emailbannersmall

MACS will have a blockbuster line-up of mobile A/C technical training covering automotive and light duty truck, heavy duty truck, off-road and recreational vehicles. There will be 31 classes presented by 36 industry experts that will include: Mark Quarto of FutureTech Auto who will provide the Keynote Address, Ward Atkinson of Sun Test Engineering, Chenise Farquharson of the U.S. E.P.A and Tao Zhan of the California Air Resources Board will provide industry regulatory perspective.

2017 ProgramView the full program schedule

Automotive and light-duty mobile A/C training classes will be presented by:

Bobby Basset of Gates Corporation,

Bruce Bivens of Toyota,
MACS trainer John Brunner,

Tim Craig of Mahle Behr Troy Inc,

Jim Cokonis of Carquest,

Eugene Dianetti of Parker Hannifin,

Dave Hobbs,

Tim Iezzi of Iezzi’s Auto Service,

Lindsay Leitzel of Mahle Behr Troy Inc.,

Tony Martin of Automotive Curriculum Consulting,

Peter McArdle of Four Seasons,

Al McAvoy of Fiat Chrysler,

Jerry Mungle of ACDELCO,

Peter Orlando of Automotive Training Technologies and

Bob Pattengale of Robert Bosch

Heavy duty and off road mobile A/C training classes will be provided by:

Dick Ennis of T/CCI Mfg.,
Gary Hansen of Red Dot,

Jeff Holbert of Trans/Air,

Fred Johnson of Dyson International,

Keith Johnson of PACCAR,

Jeff Schultz of Schrader,

Dan Spurgeon of CAT,

Larry Turay of LETCO and

Sherwood Wheeler of Agco.

Andy Fiffick of Rad Air Complete Car Care and Christian Klein of RPM Auto Marketing, , will hold a panel discussion on service shop marketing and Agnes Perez Morales of Auto Air of Puerto Rico and Leo Salinas of TVC One will provide a Spanish language training program.

Industry networking is the number one reason attendees cite for participating, as the MACS annual Training Event and Trade Show is the number one meeting place for all professionals in the total global vehicle climate and thermal management industry. Social networking kicks off on Wednesday, February 15 with both the annual golf tournament in the morning and a comedy and magic show in the evening.

MACS is grateful for the generosity of our loyal sponsors who dedicate resources to our training event .Gold sponsors include: Four Seasons, MEI, RED DOT and TSI Supercool.

Gold Sponsors4516

Silver sponsors include; Bergstrom, CSF Eaton, Honeywell, Mahle Service Solutions, MOTOR magazine, Omega-Global-Santech, Professional Tool and Equipment magazine Robinair, Spectra Premium, Sunair, Underhood Service magazine, and Universal Air Conditioner. General program sponsors include:


1-800-Radiator, Behr Hella Service, Continental VDO, Contitech Veyence, Gates, Liland, Nissens, Ogura Clutch, T/CCI Mfg. Inc, Texas Truck A/C, and Tracer Products.


Golf hole sponsors include: Arkema, AutoZone, CPS, Experian, Errecom, Four Seasons,  I.H.S., Mahle Service Solutions, O’Reilly,  REDDOT, Trans/Air and Trensor.


An adjacent meeting will also be held onsite by the Car Care Council Women’s Board on Wednesday, February 15 and Thursday, February 16. Information can be found on their website at

728X90- Save the date 2017 Winter

Attendees can find a complete list of classes and events and register for them on the MACS website at , and exhibitors can now sign up for booth space by contacting Pam Smith, MACS events manager. The MACS Trade Show will take place on Friday, February 17, 2017.

Links are also available to reserve a hotel room at the Anaheim Marriott where the host hotel room rate is $165 per night plus tax single or double occupancy. Be sure to become a Marriott rewards member to obtain free in-room Wi-Fi. Links to discounts for ground transportation are also available.

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



Posted in #1234yf, Automotive training, MACS Member, MACS Training Event, Mobile Air Conditioning | Tagged , , , , , , , , | Leave a comment

MACS member Honeywell wins “Heroes of Chemistry” award for R-1234yf

By Steve Schaeber, MACS Technical Editor

On Sunday, August 21st, 2016, MACS member Honeywell received the 2016 “Heroes of Chemistry” award from ACS, the American Chemical Society, during a black tie dinner ceremony at the 252nd ACS National Meeting at the Pennsylvania Convention Center in Philadelphia.

(Figure 1) IMG_20160824_102746

The ACS Fall 2016 National Meeting in Philadelphia was held at the Pennsylvania Convention Center August 21-25, 2016.

The award was presented to the team at Honeywell, including Nacer Achaichia, Amy Jones, Hang Pham, Robert Richard, Rajiv Singh, Harry Tung and Ron Vogl for their work in developing HFO-1234yf, a non-ozone depleting and low global warming potential hydrofluoro-olefin refrigerant for mobile air conditioning systems.

The Honeywell team identified and developed the next generation hydrofluoro-olefin (HFO) refrigerant for mobile air conditioning (MAC) systems. This new hydrofluoro-olefin (HFO-1234yf) has a global warming potential (GWP) of 4 as compared to the GWP of 1430 that is associated with R-134a, the most commonly used hydrofluorocarbon MAC refrigerant being used today.  Additionally, HFO-1234yf is a “near drop-in replacement” for R-134a, meaning it can be used in current air conditioning systems with little adaptation.  HFO-1234yf is now the leading non-ozone-depleting and low GWP fluorocarbon used in mobile air conditioning applications.

Image 2 - Solstice Canisters- both

A team at Honeywell’s UOP also won a 2016 HOC award for their Green Jet Fuel, which is made from renewable sources.

More information about the ACS Heroes of Chemistry awards can be found on their website or by clicking on this link to the 2016 awards:

Here’s a link to the ACS video on YouTube about Honeywell’s 2016 award:


Posted in #1234yf, Environmental Protection Agency, MACS Member, Mobile Air Conditioning, Refrigerants | Tagged , , , , , , , , , | 1 Comment

What does desiccant look like after 16 years?

By Steve Schaeber, MACS Technical Editor

We’ve all heard this word before, probably for the first time during one of our HVAC (heating, ventilating and air conditioning) classes when we were aspiring young technicians still in high school, college or post-secondary votech school. We learned that the desiccant in a mobile A/C system is located inside either the accumulator in an FOT (fixed orifice tube) system, or inside the receiver / dryer of a TXV (thermal expansion valve) system.

The job of the desiccant is to adsorb moisture, or water that may be in the system. If left unchecked, this moisture can be extremely harmful to air conditioning components. It can freeze inside the expansion device, restricting the flow of refrigerant into the evaporator. There is also concern that if it combines with refrigerant, it can develop hydrofluoric acid, which can damage metal surfaces inside the system. Too much moisture can also cause high head pressures, adversely affecting A/C system performance.

When desiccant is new, of course, it’s usually clean, dry and white or clear in color. But since it’s typically located inside a solid steel or aluminum cylinder, we don’t often get to see what it looks like, or what happens to it over time. That’s why we decided to take our latest accumulator over to the workbench and cut it open to see what’s inside. This one is off of a 2001 Pontiac Grand Prix that only has 106, 066 miles on the odometer. It’s a Delphi (then Harrison Thermal Systems) Accumulator / Dehydrator, part number 7841.

DSC_0012 (Figure 1)Accumulators are usually easy to spot after you’ve worked on mobile A/C systems for a while. They are usually made from aluminum, and are quite a bit larger than their R/D counterparts.

DSC_0032 (Figure 2)We cut this accumulator just below the factory welded seam. Inside you can see the desiccant pouch, dip tube and filter screen.

DSC_0042 (Figure 3) Using a razor blade it’s easy to cut open the felt pouch which contains the desiccant beads. GM puts UV Dye in most of their A/C systems right at the factory, which is why the beads and sack look green. Some of the beads are darker in color, likely indicating dirt in the system which is expected considering its age and mileage.

Have you opened up any A/C components and found something unexpected? Maybe you’ve found something that made you say, “Hey, that’s pretty cool!” Why not share your photos and findings with your fellow MACS members! Send an e-mail to to share your story.

Members of MACS are part of a close-knit community of mobile A/C professionals. If you’re not a member yet, you should be! Visit to learn more about joining the industry’s premier association today!


Posted in Automotive, Automotive training, Mobile Air Conditioning | Tagged , , , , , , , | 1 Comment