Electronically controlled variable displacement compressors
November 16, 2021
what if" this system used an electronically controlled variable displacement compressor instead of the pressure controlled variable displacement compressor? What would the results be?Read Article >
Meet MACS member, Tom Lech
November 8, 2021
Stationed in San Francisco, California, 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. to closing at 7 p.m. for the last 27 years, with summertime only increasing the demand for the shop’s services.Read Article >
What do you know about the fixed displacement piston compressor?
November 2, 2021
What do you know about the fixed displacement piston compressor?Read Article >
Bring the heat!
November 1, 2021
At this time of year, 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 … Winter is coming. It’s early September, and the leaves on some trees are already starting to change. Winter is coming.Read Article >
Tesla aftermarket repair information
October 29, 2021
NASTF has released new information on industry changing news! After 4 years of working together with Tesla, NASTF is pleased to announce that Tesla scan tool and service information is now available to the aftermarket. For the American and Canadian markets (Canadian version is in the final testing stages) things are changing rapidly that's why the National Automotive Service Task Force (NASTF) has brought their best experts to explain how to find, set-up, and implement this new information so you can add this new service opportunity to your shop.Read Article >
J1587/J1708 and J1939 data line diagnostics
October 27, 2021
Modern heavy-duty equipment is basically comprised of computers with operating units attached. In short, it is a multiplexing system that replaces traditional power distribution devices with ECUs that communicate electronically over the vehicle datalink.Read Article >
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.Read Article >
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.Read Article >
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.Read Article >
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.Read Article >
Transit bus cooling system overhaul
September 28, 2021
Upon inspecting the 300,000-mile bus, we found several concerns likely contributing to the engine’s overheating situationRead Article >
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.Read Article >