Join us at AC/cess 2018

If you need more reasons to escape from winter’s grasp and head for sunny Florida next February, I’ve got a bunch for you. MACS Worldwide will return to the Caribe Royale in Orlando Feb. 14 through 17, 2018. The event’s theme is ACcess and that’s what the programming is all about: giving you access to the information, training, tools and equipment you will need to make next year the best you’ve ever had in the business.

Click here for the full program of ACcess 2018

More than 20 technical trainers, specialists and other mobile air conditioning experts are available to you during the MACS Training Event and Trade Show. The program schedule, designed to maximize value for participants, affords the opportunity to select eight training options for a total of 12 hours of focused classroom instruction.

Two unique program tracks are offered. One features training for the automotive / light truck arena. A second track caters to those operations dealing with service of HD truck / off-highway vehicles. Since you can’t be in two places at once, but may have interests in both areas, it makes sense to bring a second (and maybe a third) team member along.

Beyond the classroom experience, additional learning options abound. A general session on Friday morning adds another two hours to your experience, as presenters focus on this industry’s opportunities and challenges, both current and in the years ahead. A keynote luncheon provides both food and thought, and a second lunch with focused roundtable discussions brings experts together with you and your industry peers for an exchange of ideas in a less formal setting.

In your everyday world, most suppliers are represented by voices on the phone, faxes or emails. At the MACS trade show, you have direct, face-to-face contact with the leading manufacturers and suppliers of parts, tools and equipment used in your shop. Suddenly that voice on the phone or other electronic communications has a face and personality, offering a new and better dimension to your interactions. You can also use this time to discover the newest and the best products and services to enhance your operations back home.

Last but not least, you know what they say about all work and no play, and the MACS event promises time for some social interaction and fun. It has been my experience that informal discussions and the connections made during the “down time” of these events often provide unexpected epiphanies and sometimes lead to lifelong friendships.

I hope to see you in February! For more information Visit the MACS website at

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Engine cooling fans-enough time?

By Steve Schaeber, MACS Technical Editor

The hottest days of summer are the most taxing on an engine cooling system. Drivers run their air conditioners to stay cool, which makes the system work even harder, particularly when driving in humid or mountainous regions, or in city traffic. That’s why it’s not surprising to many technicians during this time of year when electric cooling fans continue to run, even after the ignition has been turned off.


If the computer detects high enough engine coolant temperatures, it may decide to run the fans for an extended period of time to help cool things down. Some algorithms will even cycle cooling fans on and off several minutes after the vehicle has been powered down. These are usually indicated by an underhood label, which states something like: “Fans may continue to run after engine has been turned off.” Or, “Caution: Electric fans may turn on or off at any time.”

Some customers don’t know this can be a normal part of the vehicle’s operating strategy, prompting questions that may lead to service visits to make sure everything’s working as intended.

These misunderstandings may also prompt unnecessary component replacement which was recently  the topic of Volkswagen Technical Bulletin # 2022549 entitled: “Electric Coolant Fans Continue to Run after Ignition is Switched OFF.” Evidently VW has found that too often technicians are replacing electric cooling fans because they won’t turn off after what is considered to be enough time. It’s how long that time period lasts that seems to be the main concern. While some may think that the fan should turn off after only a few minutes, VW considers 15 minutes of extended cooling fan operation to be normal on certain gasoline-powered engines, and up to 16 minutes on diesels.


It makes sense that this could become a problem, considering that the level of detailed operating strategy is often not included in most service information systems. This leaves technicians at a disadvantage when diagnosing such operational issues when the system appears to be acting normally from one point of view, but not from another. Technicians know, for example, that many engine cooling fans continue to run when temperatures are high, but experience indicates they generally only remain active for a few minutes, maybe up to 5 at the most.  Thus, when a manufacturer includes operating strategies similar to this into a vehicle’s programming, and the information is not made available at the service and repair level, unnecessary replacements such are often made.


To avoid this practice, technicians should begin by documenting the amount of time fans remain active after the ignition is turned off. After doing so, verify if the fans are turning off before the 15 or 16 minute time interval. If they do, it is considered normal operation, which should be explained to the customer. If they continue to run beyond the time limit, however, VW recommends using its GFF (guided fault finding) method for troubleshooting the system.

Do you like the information you’ve read here? There ‘s so much more to discover if you become a member of the Mobile Air Conditioning Society (MACS) Worldwide. Visit our webiste at


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After January 1, 2018, Section 609 certification is required to purchase refrigerant

Please be aware after January 1, 2018 a Section 609 certification card will be required to purchase R-12, R-134a, or R-1234yf cylinders of 2 pounds or more.

Distributors will be required to keep records of certified technicians purchasing refrigerant.

Click here to read the regulations on the EPA website.

Click here to learn about and obtain Section 609 certification from MACS Worldwide. Cost $20.

Click here to learn how to replace missing or lost Section 609 MACS or IMACA credentials. There is a  $10 replacement fee.

If you are already Section 609 certified your credentials are good for life.There is no mandatory re-certification required by EPA, however the Section 609 training program was updated as of 1/1/2015 and includes information on the new refrigerant R-1234yf. If you’d personally like to expand your knowledge visit our website and download the study guide.

Click here to learn about EPA Fines for not being Section 609 certified see CAA fines. Maximum daily fine $44,539.

For more information call the MACS office at
215-631-7020 x 0 email us at

Visit the full MACS website at

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Can you afford the fines for not complying with Section 609 certification?

The MACS office has received some questions recently on fines for violation of Section 608 and 609 noncompliance. Here are some answers:

EPA assesses penalties for violations on a case-by-case basis, based on many factors outlined in EPA’s penalty calculation policy. The most recent Civil Monetary Penalty Inflation Adjustment Rule was published on July 1, 2016 (81 FR 43091). See For violations that occurred after November 2, 2015 and for which the penalty was assessed after August 1, 2016, the Clean Air Act maximum statutory daily penalty is $44,539.

The max total for cases settled administratively is $356,312.

Section 609 compliance tests cost $20 on the MACS website -just sayin’!

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Blower motors are essential to proper HVAC performance

The blower motor can make or break HVAC performance. Solid blower motor troubleshooting, along with an attention to detail, will help ensure that your customer’s HVAC system performs properly, the way the carmaker originally intended. When diagnosing HVAC issues, keep these tips in mind for successful blower motor repairs and satisfied customers:

Check out motor operation.

The lack of airflow may be an obvious clue to blower motor problems, but there are several other symptoms that can signal an issue. Keep an eye out for the following symptoms:

  • Noisy motor – squealing or grinding
  • Motor vibration
  • Excessive heat on motor case
  • Intermittent operation
  • Burning odor from the motor

Get all the specs before ordering.
Once you diagnose the need for a new blower motor, make sure you get all the application information before you order the motor. Being prepared with the application information is the best way to ensure that you’ll get the right part, the first time. Aside from the basic year/make/model information, you’ll need to note if the vehicle has A/C, because the part may be different on vehicles without it. For the dual systems found on many SUVs and minivans, you need to specify front or rear application. In many cases, the mountings and electrical connections are different. Also, check for any pertinent manufacturer notes in the parts listing.

Look for additional problem areas.
Occasionally, it takes more than a new motor to restore “original” performance. But, a quick check of other HVAC system components can eliminate potential problems and increase your service opportunities. You should conduct a thorough inspection of the following components:

  • Blower wheel – look for cracks or damaged fins.
  • Thermostatic dashboard control unit – check operation.
  • Fusible links – inspect condition.
  • Heater core, heater hoses and clamps – check for leaks and loosening.
  • Air recirculation ducts and doors – inspect the seals.
  • Heater box – check for debris blocking ducts.
  • Flexible corrugated ductwork – look for cracks or dry rot.
  • Cabin fresh air filter (late models) – replace as needed.

Tech Tip courtesy of VDO Product Managers. For additional product information, please visit:, contact: or call 800-564-5066.

Posted in Automotive training, Electrical/Electronic, MACS Member, Mobile Air Conditioning, Refrigerants | Tagged , , , , , , , , , | 2 Comments

Registration is now open for MACS 2018 Training Event and Trade Show

– A/Ccess is the theme of the MACS 2018 Training Event and Trade Show to be held February 14-18, 2018 at the Caribe Royale Hotel and Convention Center. Attendees will gain A/Ccess to the mobile A/C and engine cooling service and repair information needed to make accurate diagnoses and reliable repairs; A/Ccess to the experts in the field who design and manufacture A/C systems, components, tools and equipment; and A/Ccess to network with other mobile professionals. In addition to blockbuster training classes, the MACS 2018 Training Event and Trade Show includes a trade show, a golf tournament and multiple networking opportunities in relaxed social settings.

A complete list of events for the MACS 2018 Training Event and Trade Show is available on the MACS website at and at this link: . Registration for the training event can be completed at the MACS website, or by phone at 215-631-7020 x 0 or by fax at 215-631-7017. Email inquiries can be sent to .

Host hotel reservations for the Caribe Royale can be made by phone at 888-258-7501 or on the hotel page of the MACS website. The MACS hotel room rate is $165 plus tax single or double per night. Be aware neither MACS or the Caribe will never call you to book a hotel room please be alert to scammers looking to steal your credit card information.


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 2018 Training Event and Trade Show, A/Ccess will take place February 14-17 at the Caribe Royale Hotel and Convention Center in Orlando, FL. A current calendar of all regional training can be found on the training page of MACS website.


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A technician’s approach to HVAC diagnosis and testing

Twenty years ago, we could break down all areas of HVAC diagnostics into three categories when you really think about it. It was and still is called Heating, Ventilation, and Air Conditioning (HVAC). All of the HVAC parts and components did the same thing NO MATTER what vehicle they were installed on. A compressor pumps, the TXV valve meters, the heat-exchangers allow a change of state, etc.

Even if the car had Automatic Climate Control, we still needed to determine some basic operating characteristics before going deep into system diagnostics. I’ll spare the customer confirmation and validation of the problem speech for this writing. Let’s just say, something in the HVAC is broken and we know it’s broken! By the way, while we’re talking about validation of the customer’s concern, let’s get the ugly word “Intermittent” out of the way. I was taught a very long time ago by a GM instructor that there is NO SUCH THING as an Intermittent. We just haven’t duplicated the conditions necessary for the problem to replicate itself.  Read the entire story

Download the entire September/October 2017 Issue
Learn more about the Mobile Air Conditioning Society at our website at

Posted in #1234yf, ACtion Magazine, MACS Member, MACS Training Event, Training | Tagged , , , , , , , , | Leave a comment

Why you need to be Section 609 certified

Some new regulations concerning the requirement of technicians to be Section 609 certified will be put into place on January 1, 2018.

They are:

  • The final rule published November 2016 extends Section 608 requirements to HFCs. Starting Jan. 1, 2018, sale of most refrigerants will be restricted to 608 and 609 certified technicians; distributors, and distributors must keep refrigerant sales records and verify purchasers are (or employ) 608 or 609 certified technicians.
  • Small cans (2 pounds or less) of non-exempt refrigerants may continue to be manufactured or imported and sold after Jan. 1, 2018 if equipped with self-sealing valves.
  • To learn more about Section 609 certification visit the MACS website at and click here.



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Check out MACS 2018 Training Event and Trade Show Schedule

Registration opens Tuesday, September 5, 2017 for the February 14-18, 2018 Event in Orlando, FL. Complete details at this link.


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MACS heavy-duty mobile A/C training with Mahle October 5-6 in York, PA

MACS member, Mahle Service Solutions located in York, PA has graciously opened its manufacturing facility for a MACS Section 609 Certification class on Thursday, October 5 from 2pm-5pm. Also, on Friday, October 6 MACS and Mahle will host a MACS Heavy-duty Vehicle Mobile A/C Best Practices clinic from 9am-3pm. Steve Schaeber, MACS manager of service training will present the MACS clinic material and representatives from Mahle Service Solutions will demonstrate recovery and recycling techniques using their equipment on a heavy-duty vehicle.


Thursday, Section 609 class will include:

  • Why venting refrigerant is prohibited
  • Rules and regulations applicable to mobile A/C service
  • A/C tools and equipment requirements
  • Current and new refrigerants, including R-152a, R-1234yf, and R-744 (CO2)
  • OE manufacturer recommendations
  • Finding leaks
  • How to properly recover refrigerant
    Friday, seminar topics in the MACS clinic will include:
  • Mobile A/C system types: components and operation
  • Condensers, evaporators, compressors, lines and hoses
  • Receiver/Driers & TXVs – accumulators and OTs
  • Control devices: What they are and how they work
  • Diagnosing, testing and servicing mobile A/C systems
  • Refrigerant recovery and recycling
  • Compressor diagnosis and replacement
  • Proper oil balancing and accurate charging
  • A/C system troubleshooting and performance testing
  • Best practices repair methods


Cost to attend this training event is $75 for member of MACS and $125 for non-members. The event will include lunch. To register or become a member of MACS attendees can call the MACS office at 215-631-7020 x 0, visit the MACS website and register through the events tab, or fax a registration to 215-631-7017.

To learn more about MACS member Mahle Service Solutions, visit their website at . Mahle has been a member of MACS for 18 years.


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