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The concept of superheat

October 19, 2021

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

October 14, 2021

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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Don’t try this at home

October 6, 2021

Don't try this at home! We do not recommend adding a machete to your mobile A/C tool kit. However, in Belize they do things differently. Sometimes necessity is the mother of invention.
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Behavioral characteristics of various compressor types pt. 2

October 5, 2021

So now it is time to provide the correct answer along with information on why it is correct and also information on why the others are incorrect.
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Understanding and troubleshooting data lines on heavy-duty trucks

September 23, 2021

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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AEM Update: Snap application for off-highway R-1234yf

September 22, 2021

MACS will have a variety of heavy-duty and off-road presenters beginning at 8 am on Thursday, September 30.  One will be AEM Update: Snap application for Off-highway R-1234yf
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Behavioral characteristics of various compressor types

September 21, 2021

When faced with a challenging A/C system problem, knowing what type of compressor you are dealing with can help streamline the diagnosis process. 
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Cooling fan circuit analytics

September 16, 2021

What is Peter Orlando’s class Cooling Fan Circuit Analytics about? It all began decades ago as a mechanical fan attached to the water pump with and without a fan clutch.  And now it has evolved into an efficient complex electrical motor control of cooling the modern internal combustion engine.
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A burned clutch is a symptom of another problem

September 14, 2021

Not much thought is given to compressor clutches until they fail, but they are extremely durable.  I have personally owned three vehicles that had between 200, 000 and 240,000 miles on them.  They all still had the original compressors and clutches, and they were still functioning perfectly.
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Facts to know about the compressor clutch coil

September 7, 2021

Checking the clutch air gap before installing a compressor is an important step in compressor installation. This is because of the possibility of a clutch air gap getting knocked out of adjustment due to rough handling or it being gapped incorrectly at the factory.  These issues of course can cause problems with clutch operation.  If detected and corrected before compressor installation, a lot of time can be saved.
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