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Compressors 101

May 2, 2022

You are invited to attend a compressors 101 class I will be conducting next week at the MACS training facility in Lansdale, PA.  The title of the class is Behavioral Characteristics of Various Compressor Types.  It is happening live on Wednesday May 11 from 5:30 to 9:00pm
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Earth Day 2022

April 22, 2022

MACS celebrates Earth Day 2022
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MACS 2023 Annual Training Event and Trade Show

April 7, 2022

MACS 2023 Annual Training Event is back on schedule for 2023! We will meet at the Gaylord Opryland Resort in Nashville, TN. February 2-4, 2023.
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No drier replacement, no compressor warranty!

April 6, 2022

Compressor manufacturers and parts distributors are adamant about driers being replaced when one of their compressors are installed. No drier replacement, no compressor warranty! 
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What is a receiver drier?

March 29, 2022

With A/C season just around the corner, this seems like a good time to provide some updated information on these units.  NOTE:  Receiver driers are sometimes called filter driers and accumulators are sometimes called accumulator driers.
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Replacement refrigerant confusion

March 22, 2022

There was a group of several refrigerants which were blends with a high percentage of R-134a and a smaller percentage of R-142 that seemed to be the most popular.
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Section 609 certification reminders

March 21, 2022

Currently, all technicians must show their certification card to purchase R-134a refrigerant in quantities of 2-pounds or more.
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What does a MACS Section 609 card look like?

March 10, 2022

MACS occasionally receives reports from the field of a technician being refused purchase of refrigerant for not having a proper Section 609 card. Usually this is due to the technician not producing the right card or the counterperson not understanding what a MACS Section 609 card looks like. What does a MACS Section 609 card look like?
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Checking for refrigerant contamination

February 24, 2022

A large percentage of MACS members have refrigerant identifiers and use of them on vehicles that come into their shop for A/C service prior to beginning any service work is standard procedure. However, there are a lot of non-MACS member shops who do not have identifiers and unfortunately are not aware of the potential issues which can be caused by refrigerant contamination.
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Correcting user error

February 15, 2022

As mentioned in last week's article, the first thing I did with the machine was check the pressure of the refrigerant in the tank.  It was extremely high (well over 400 PSI) indicating there was a refrigerant contamination problem. 
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