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According to AUTO ZONE in phoenix, the freon need it is 2.13 psi when empty. about 32 oz, gauge need to be calibated according the climet temeperature where you live @ : 65=25-35 psi 70=35-40 psi 75=35-45 psi 70=40-50 psi 85=45-55 psi 90=45-55 psi 95=50-55 psi 100=50-55 psi 105=50-55 psi 110=50-55 psi here some videos: http://www.efproducts.com/instructional_videos.html

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17y ago

What else can I help you with?