March 2022 - 32
TOOL BRIEFING
Moving from R-134a to R-1234yf
More and more independent shops are beginning to see R-1234yf systems in for
service or repair. It's important to examine a variety of factors when choosing a
dedicated or dual usage machine.
By Christopher Groff, Contributing Editor
131595774 © Amnat Jomjun | Dreamstime.com
W
armer months are fast approaching,
bringing with them a myriad of air conditioning
services and repair opportunities.
Early usage of R-134a began in 1992,
with full-scale adoption by the 1995 model year.
Shops, technicians, and customers have had over
25 years of experience with this refrigerant. As
with all things, though, changes come, and the
industry has been transitioning over to R-1234yf.
More shops are beginning to see these new
refrigerant systems coming through their bays
and realizing that they may not be adequately
trained or equipped to evaluate and service them
32 PTEN MARCH 2022 www.VehicleServicePros.com
properly. Let's start with a quick primer on the
main differences and then delve into equipment
selection and an examination of best practices to
ensure you can provide the best service to your
customers.
R-1234yf and R-134a systems are very similar, though one
needs to consider slight design differences when servicing,
diagnosing, and repairing systems. R-1234yf has a reduced
cooling capacity compared to R-134a systems, generally
between five percent to 25 percent lower. Combining this
reduced cooling ability with more minor charges in a system
means less leeway when it comes to system health. Small leaks,
dirty condensers, or evaporators will reduce cooling and lead to
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March 2022
Table of Contents for the Digital Edition of March 2022
EDITOR'S NOTE
NEW PRODUCTS
DIAGNOSTIC TECH
TOOL BRIEFING
TOOL REVIEWS
CATEGORY SPOTLIGHT
BIG TIME BOXES
March 2022 - 1
March 2022 - 2
March 2022 - 3
March 2022 - 4
March 2022 - 5
March 2022 - 6
March 2022 - 7
March 2022 - EDITOR'S NOTE
March 2022 - 9
March 2022 - NEW PRODUCTS
March 2022 - RSC1
March 2022 - RSC2
March 2022 - 11
March 2022 - 12
March 2022 - 13
March 2022 - 14
March 2022 - 15
March 2022 - 16
March 2022 - 17
March 2022 - 18
March 2022 - 19
March 2022 - 20
March 2022 - 21
March 2022 - 22
March 2022 - 23
March 2022 - 24
March 2022 - 25
March 2022 - 26
March 2022 - 27
March 2022 - DIAGNOSTIC TECH
March 2022 - 29
March 2022 - 30
March 2022 - 31
March 2022 - TOOL BRIEFING
March 2022 - 33
March 2022 - 34
March 2022 - 35
March 2022 - TOOL REVIEWS
March 2022 - 37
March 2022 - 38
March 2022 - 39
March 2022 - CATEGORY SPOTLIGHT
March 2022 - 41
March 2022 - 42
March 2022 - 43
March 2022 - 44
March 2022 - 45
March 2022 - 46
March 2022 - 47
March 2022 - 48
March 2022 - 49
March 2022 - BIG TIME BOXES
March 2022 - 51
March 2022 - 52
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