HVAC Technology Changes that Make Modern A/C Systems more Challenging to Diagnose and Repair with Peter McArdle of Four Seasons


Peter McArdle
Four Seasons

One of the top-shelf A/C classes being taught at MACS 2020 Training Event is the challenge of change in mobile A/C with Peyter McArdle of Four Seasons. A myriad of changes to systems design and operation over the past ten to fifteen years can make diagnosing and  repairing a modern air conditioning system diabolically difficult. The greater  use  of  computer  controls  including  volume flow sensors, eVDCs (electronically controlled variable displacement compressors), electro-viscous fan clutches, evaporator thermistors, multi-speed cooling fans, active grille shutters, dual zone systems etc. can really darken your diagnostic day. Couple these technologies with changes in basic component design such as the use of flat  tube,  multi-pass, multi-path flow, sub-cooling condensers, idle stop evaporators, oil retention compressors etc. and it can be overwhelming to know where to begin your diagnosis of a poorly performing system.

“Join us for this class at MACS 2020 when we will explain some of these changes in detail and their impact on system operation and diagnostics. We will look at some of the issues and failures associated with these technologies and how best to cut to the diagnostic chase.”

Register now for MACS 2020 Training Event on the MACS website at www.macsw.org

About macsworldwide

Mobile Air Conditioning Society (MACS) Worldwide Founded in 1981, MACS is the leading non-profit trade association for the mobile air conditioning, heating and engine cooling system segment of the automotive aftermarket. Since 1991, MACS has assisted more than 600,000 technicians to comply with the 1990 U.S. EPA Clean Air Act requirements for certification in refrigerant recovery and recycling to protect the environment. The Mobile Air Conditioning Society (MACS) Worldwide’s mission is clear and focused--as the recognized global authority on mobile air conditioning and heat transfer industry issues. www.macsw.org
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