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Robinair and MACS to certify 500 technicians

May 19, 2022

MACS member Robinair is partnering with the Mobile Air Climate Systems Association (MACS) to provide free Section 609 test prep webinars for training and certification for technicians this summer on June 16, July 13, August 17, and September 14.
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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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Refrigerant supply, pricing and safety

March 8, 2022

What I'm hearing about refrigerant supply and pricing this year reminds me of a similar period in the mid-2000s. It was springtime, just before the start of A/C season.  Supplies of R-134a were tight and the price had come close to tripling from the prior year.
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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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Air contamination in an A/C system can ruin your day

February 2, 2022

I had a memorable encounter with air contamination in the mid 1990s.  I was conducting a lot of retrofit clinics at the time and had recently acquired a demo refrigerant identifier which I took to those clinics. At one clinic, there was a technician who was extremely interested in the refrigerant identifier.  
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Top three tips on orifice tube behavior

July 20, 2021

In the last four MACS blog articles we covered a lot of detailed information about orifice tube system behavior. We examined a system with a full refrigerant charge verses a 25% undercharge. Now it is time to condense it all down into three important takeaways.
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Low refrigerant charge and the search for real data

June 22, 2021

I had read about how low refrigerant charges could increase compressor operating temperatures and decrease the amount of oil flowing to compressors, but I had never been able to find results from any tests. After discussing this with MACS, we decided to do some testing to get some real data.
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Refrigerant capacity and mobile A/C service: part 2

June 15, 2021

One of the most frequently asked questions on tech help-line calls concerns refrigerant capacity: How much refrigerant is in that mobile A/C system, and have you checked to be sure the refrigerant is pure?
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Refrigerant capacity and mobile A/C service

June 8, 2021

One of the most frequently asked questions on tech help-line calls is: How much refrigerant is in that mobile A/C system, and have you checked to be sure the refrigerant is pure?
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