Tag Archives: compressor

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 … Continue reading

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Do you know how to optimize system charge levels for modern condensers?


Attend MACS 2016 Training Event and Trade Show, February 11-13, 2016 at the Caribe Royale all-suite hotel and convention center in Orlando, FL and you’ll be able to take part in training classes like this: Optimizing System Charge Levels For … Continue reading

Posted in Automotive, Automotive training, MACS Training Event, Mobile Air Conditioning, Training, Uncategorized | Tagged , , , , , | Leave a comment

One of those A/C things


One of the problems every shop faces – because customers don’t realize what’s normal and what isn’t – is how a system works. When the 2001 model year small GM SUVs were introduced (Chevy Blazer S-10, GMC Jimmy and Olds … Continue reading

Posted in Automotive Aftermarket, Automotive training, Electrical/Electronic, Mobile Air Conditioning, Refrigerants, Uncategorized | Tagged , , , , , , , , | Leave a comment

Do you know how to defend your repair turf?


You fix an air conditioning leak, recharge the system, and shortly thereafter the motorist is back, complaining that he turned on the A/C, the engine soon started to run rough and the Check Engine light came on and is still … Continue reading

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Hyundai installing dual-refrigerant compressor


By Steve Schaeber, MACS Technical Editor My uncle Joe recently purchased a 2014 Hyundai Sonata to use as his commuter car for getting back and forth to work. When he brought it over to my house, naturally one of the … Continue reading

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A compressor repair story


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How does a mobile A/C accumulator work?


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Compressor Command Decisions


by Jacques Gordon When you’re trying to find out why an electrical device doesn’t work when the switch is turned on, do you start at the device itself and trace the circuit backwards through the system till you get to … Continue reading

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General Motors eAssist Cooling Systems


Water-cooled starter/generator (GM photo) by Jacques Gordon GM’s eAssist™ is a mild-hybrid system that was introduced on the Buick Regal in 2012 and is now available on the Buick LaCrosse and Chevrolet Impala. As on other hybrid vehicles, the eAssist … Continue reading

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Variable Displacement A/C Compressor


(Delphi Automotive illustration) by Jacques Gordon When a belt-driven piston-type A/C compressor is engaged, it produces a noticeable ‘thump’ and a reduction in engine power. This can be eliminated by keeping the compressor  engaged all the time and controlling refrigerant … Continue reading

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