PAG oil?

Tiny
JHEND1
  • MEMBER
  • 2012 HYUNDAI SONATA HYBRID
  • 2.4L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 187,000 MILES
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How to Vacuum Down and Recharge Your A/C System!

How come the Oil isn’t evacuated with the Freon?
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Tuesday, June 6th, 2023 AT 11:12 AM

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Tiny
CARADIODOC
  • MECHANIC
  • 33,661 POSTS
Pumping the system into a vacuum is done to remove any moisture from the system. In a vacuum, water boils at 77 degrees Fahrenheit. It gets pulled out as a vapor. Any refrigerant has been long gone by that time. It boils somewhere, as I recall, at around minus 70 degrees. The oil doesn't vaporize so it just sits in the system during the entire process.
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Tuesday, June 6th, 2023 AT 2:20 PM

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