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How much R135a refrigerant and PAG oil to put in system after pressure switch replacement?

  • 2008
  • Cayman S
Mileage: 
77 000
Heating and Ventilation
Suffolk, 
Virginia

I had to replaced a broken A/C pressure switch/transducer. System refriregent escape. I’m vacuuming the system first and then will be adding refriregant and oil. The question is how much needs to go into the system?

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