[wiseman]

While doing my last A/C recharge, I couldn't get the temps at the vent to get much past about 62 degrees. Based on th chart below, and the 98 degree temps I'm not that far off at the pressures I read on the guage. 62 degrees with 50 lbs at the low side and 98 degrees ambient temp. Thought this chart would be helpfull.

AC System Gauge Readings

The following table is a general guideline for A/C system pressures and temperatures based on the 98 degree outside ambient outside temperature. Remember that these are a guideline and your actual temperatures and pressures will vary depending on humidity in the air and the condition of your system.

A/C System Pressure Readings
Ambient Temperature Low Side Pressure High Side Pressure Center Vent Temperature
60 °F 28-38 psi 130-190 psi 44-46 °F
70 °F 30-40 psi 190-220 psi 44-48 °F
80 °F 30-40 psi 190-220 psi 43-48 °F
90 °F 35-40 psi 190-225 psi 44-50 °F
100 °F 40-50 psi 200-250 psi 52-60 °F
110 °F 50-60 psi 250-300 psi 68-74 °F
120 °F 55-65 psi 320-350 psi 70-75 °F


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