Vacuum and charge

120,123 MILES • 3.5L • 2WD • AUTOMATIC
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DADDYA
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  • 29 POSTS
I have installed a new compressor,expansion valve and condenser with the receiver/drier attached. My question is do I turn the blue and red manifold gauges open when vacuuming? Second question the system is empty do I charge it with the AC and engine on or put refrigerant in without running?
Jun 18, 2017 at 2:03 AM
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SATURNTECH9
  • ✓Experienced Mechanic
  • 30,869 POSTS
You vacuum it with both the red and blue valves open. You will charge it only through the low side which is blue. You can charge it with it running if you want. I usually just charge it with it off.
Jun 18, 2017 at 7:24 AM
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DADDYA
  • MEMBER
  • 29 POSTS
Thank you Sir for the information and Happy Father's Day.
Jun 18, 2017 at 7:51 AM
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SATURNTECH9
  • ✓Experienced Mechanic
  • 30,869 POSTS
You are welcome, happy father's day to you too. please tell all your friends about us.
Jun 18, 2017 at 7:58 AM
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