Autel Ushers in New Era of HVAC Diagnostics

Autel U.S. is hosting a full day of advanced automotive HVAC and thermal-management training today at the Hilton Garden Inn Roslyn in Port Washington, New York. Led by Autel U.S. founder and MaxiHVAC AC909 developer Gary DeLuca and Gary Machiros, owner of Applied Automotive Technology and ASE Master Technician and instructor, the program brings together a full room of automotive technicians and educators from across the country to learn more about the company’s MaxiHVAC AC909 Advanced A/C Diagnostic System and its disruptive approach to diagnosing increasingly complex vehicle HVAC and thermal-management systems.

“On the side of your chairs, there should be seat belts because we’re going to go 110 miles an hour. We’ll lock in there and go. All I’m doing is giving out the information that I’ve learned and put into the tool to make you a better tech,” DeLuca said. The ultimate goal, he explained, is to help technicians diagnose and repair HVAC and thermal-management systems more effectively, positioning independent repair businesses to address the increasingly sophisticated service requirements of today’s vehicle fleet.

The introduction of the AC909 comes as vehicle thermal-management technology continues to evolve beyond traditional passenger cabin cooling. Modern systems, particularly those found in hybrid and electric vehicles, incorporate electric compressors, multiple evaporators, electronic expansion valves, heat exchangers and sophisticated electronic controls. These advancements are creating new diagnostic challenges for technicians while increasing the need for equipment capable of evaluating the interaction between mechanical, electrical and refrigerant systems.

Guest Speaker and Shop Owner

Tom Lech, a fourth-generation technician and owner of Lech Auto Air Conditioning in San Francisco, California, emphasized how automotive A/C technology is increasingly adopting principles and components long used in commercial refrigeration and HVAC applications. Drawing on decades of experience in both industries, Lech explained that traditional pressure-based diagnostic methods are no longer sufficient for evaluating today’s electronically controlled systems. Instead, technicians must understand refrigerant saturation, superheat, subcooling and the electronic controls that regulate system operation.

Lech noted that commercial HVAC technicians have already transitioned toward digital diagnostic platforms that integrate physical measurements with software-based analysis. He sees the AC909 as bringing those established diagnostic practices into the automotive service environment. As vehicles incorporate increasingly sophisticated thermal-management circuits, particularly in hybrid and electric applications, technicians need a more comprehensive understanding of how refrigerant flows, temperatures and electronic controls interact to deliver heating and cooling performance.

The MaxiHVAC AC909 is designed to bring that diagnostic capability into the service bay. The system integrates refrigerant pressures, temperatures, humidity measurements and supported vehicle diagnostic data into a single graphical interface, allowing technicians to evaluate system performance rather than relying on individual gauge readings. Guided procedures and component testing capabilities help technicians isolate faults, identify underlying causes and verify repairs, potentially reducing unnecessary parts replacement and repeat labor.

Gary DeLuca Shares Insights

DeLuca, who helped engineer the AC909, said the concept had been under consideration for approximately a decade, but earlier computing and connectivity limitations prevented its development. Advances in processing capabilities and Bluetooth connectivity now make it possible to integrate multiple diagnostic devices and measurements into a unified platform. He emphasized that input from experienced technicians and HVAC specialists was instrumental in bringing the technology to market.

Another important focus is leak detection, an ongoing challenge for automotive A/C service providers. DeLuca emphasized the need for technicians to understand both the capabilities and limitations of conventional refrigerant recovery, recycling and recharging equipment. The AC909’s broader diagnostic approach, along with advanced vacuum measurement and leak-testing capabilities available in the AC909D package, is intended to help shops identify problems more precisely, improve repair verification and minimize costly comebacks. For aftermarket service providers, these capabilities represent an opportunity to improve productivity, manage refrigerant use and retain more complex repair work in-house.

Beyond the equipment itself, DeLuca stressed that technician education and industry collaboration are essential to advancing automotive HVAC service. He encouraged attendees to share their experiences and ideas for improving the system as vehicle technology continues to evolve.