comperssor want engage

2006 MERCURY MILAN
120,000 MILES
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DALLAS2300
  • MEMBER
  • 5 POSTS
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
Aug 21, 2011 at 4:58 PM
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SATURNTECH9
  • ✓Experienced Mechanic
  • 30,869 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.
Aug 21, 2011 at 5:35 PM
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