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汽车技师

The pulse width modulated duty cycle signal

2021年12月7日

几年前, when vehicles using these compressors were just starting to show up at shops for service with some regularity, we were searching to find some detailed information about their behavior to use in clinics.  There was not a lot of it available, so we borrowed several vehicles and did some videos.  The following are some clinic slides produced from one of those videos.
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Diagnosing electronically controlled compressors

2021年11月30日

When preparing to conduct diagnostics on a system using an electronically controlled variable displacement compressor, the diagnostic process needs to focus on four areas.
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Electronically controlled variable displacement compressors

2021年11月16日,

what if" this system used an electronically controlled variable displacement compressor instead of the pressure controlled variable displacement compressor?   What would the results be?
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Troubleshooting the “what ifs” in a mobile A/C repair

2021年11月9日

High side:  Likely somewhere around 130 psi (at an idle) & 每分钟1500转140 psi.  为什么? With only a 35% charge in the system, the compressor isn't going to be producing a lot of pressure.
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Meet MACS member, Tom Lech

2021年11月8日

Stationed in San Francisco, 加州, Thomas Lech has maintained a bustling business for almost three decades. Lech Auto Air Conditioning has been busy for 365 days a year from opening at 7 a.m. 到7点收市.m. for the last 27 years, with summertime only increasing the demand for the shop’s services.
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What do you know about the fixed displacement piston compressor?

2021年的11月2日

What do you know about the fixed displacement piston compressor? 
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把热!

2021年11月1日

每年的这个时候, I often end up with an earworm in my head from a Canadian rock band … Summer’s going fast, the nights are growing colder. Then it’s the line everyone knows from something more mainstream … 冬天即将来临. It’s early September, and the leaves on some trees are already starting to change. 冬天即将来临.
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The concept of superheat

2021年10月19日

We illustrated the concept of superheat in last week's article by boiling water and superheating steam in a moonshine still. This week we will apply this concept to refrigerant in an air conditioning system.  The still has been replaced with an evaporator. 
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Over 500 automotive scholarships available

2021年10月14日

The University of the Aftermarket Foundation (UAF) is now accepting scholarship applications for the 2022-2023 school year on its Automotive Aftermarket Scholarship Central website. Scholarships from UAF and more than 40 donor organizations are consolidated and easily accessible at AutomotiveScholarships.com.
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Understanding and troubleshooting data lines on heavy-duty trucks

2021年9月23日

Understanding and Troubleshooting data lines on heavy-duty trucks will be presented byLarry Turay of LETCO Enterprises. In Larry’s Saturday morning class, attendees will learn how components and subsystem inputs and outputs can influence HVAC operations. 
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