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R-134a

Staying RRR current

October 25, 2022

The refrigerant checked out fine. No contamination with other refrigerants and no air contamination.  Their machine pulled 30 ounces out of that system.
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Essentials in PHEV and BEV Thermal  Management

October 25, 2022

You can attend HVAC Hide and Seek for Electrified Vehicles: Essentials in PHEV and BEV Thermal  Management with Dave Hobbs at MACS 2023 Training Event and Trade Show. class on Thursday, February 2 from 9:45-11:15am and again from 2:45-4:15pm.
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The ambient temperature differences

October 11, 2022

That hose is easy to get to, so I whipped it off of there and had the new one on probably in less than 3 minutes.  The owner was standing there watching and thought I was finished when I tightened up the second connection. He said he was going to go up and pay and would be back to get the car and hit the road.
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TEXA joins MACS Trade Show

October 11, 2022

TEXA joins MACS Trade Show!  MACS Training Event and Trade Show will take place February 2-4, 2023, at the Gaylord Opryland Resort and Convention Center in Nashville, TN. TEXA joined MACS as a member in 2018 and is supporting MACS Training Event as a Silver Co-Sponsor of the Welcoming Reception at the Wildhorse Saloon in downtown Nashville.
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Visit ITWSexton at MACS 2023 Training Event

October 4, 2022

ITW Sexton has been a global leader in the design and manufacture of two-piece aerosol cans for over 60 years. With a variety of styles and sizes to choose from, ITW Sexton’s product line makes it easy to select the ideal solution for a wide range of standard and customized containers - from high-pressure, specialty gases to low-pressure consumer goods. Backed by the ITW family of companies, ITW Sexton is the preferred supplier of aerosol cans for customers that demand the highest level of safety and quality.
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The refrigerant left in a system after recovery

September 27, 2022

First, here is a brief review of the results of the R/R/R machine test covered in last week's article.   A J2210 R/R/R machine left 9 ounces of refrigerant in a system which had contained 27 ounces, after doing a "complete" recovery. 
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Don’t overlook a diagnostic clue

September 13, 2022

When thinking about the topic of A/C diagnostic tools, a recovery, recycle, recharge machine (R/R/R machine) is not one of the first tools that comes to mind.  It may not come to mind at all in the world of inexperienced technicians. 
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Do you know about the B1479 trouble code?

August 3, 2022

If you work on Toyota, Lexus and Scion A/C systems, chances are that you have encountered a B1479 diagnostic trouble code on a system that will not operate. 
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It isn’t blowing cold enough

June 29, 2022

"It isn't blowing cold enough.” Most any auto repair shop that does A/C work will often hear customers say this phrase. It can be the result of any number of things that can be wrong with an A/C system.  Often it is a case of common things such as, a low refrigerant charge, a refrigerant overcharge, contaminated refrigerant,  a blend door issue, a cooling fan problem, or maybe a weak compressor.
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The importance of A/C system oil balancing

June 21, 2022

Sometimes we encounter information where directions instruct us to drain the compressor being removed from a system and measure the amount of oil that drains out. Then the next step is to subtract this number from the number of ounces that are supposed to be in the shipped replacement compressor.
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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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The desiccant myth

April 12, 2022

There is a myth that exists involving A/C service work and driers that seems to come up from time to time.  I have encountered it when handling tech calls and have seen it come up in A/C forums. Read more to find out what it is.
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