Operation CHARM: Car repair manuals for everyone.

Heating and Air Conditioning

Normal A/C System Pressures
Ambient Temperature (F) System Pressure
Normal High Side Pressure 80 150-170 Pound Per Square Inch (psi)
90 157-195 Pound Per Square Inch (psi)
95 185-205 Pound Per Square Inch (psi)
100 210-230 Pound Per Square Inch (psi)
105 230-250 Pound Per Square Inch (psi)
110 250-270 Pound Per Square Inch (psi)