COMPERSSOR WANT ENGAGE

  • Tiny
  • dallas2300
  • 2006 Mercury Milan
  • 120,000 miles

I know I need an ac gauge and I have some 134a if the freon is low I know how to add that into the low but if the high is low do I have to add anything

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Sunday, August 21st, 2011 AT 11:58 PM

1 Reply

  • Tiny
  • saturntech9
  • Expert
  • 29,400 posts

You can't how much charge you have in the system by the pressure its done by weight not pressure. Also you have to check the low and high side pressures not just the low side pressure.

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Monday, August 22nd, 2011 AT 12:35 AM

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