Automotive AC Pressure Unlocking the Secrets with an In-Depth Chart

Low side pressure should sit right at 30psi at all times the compressor is on, within a couple psi is OK. High side pressure will change ... ... readings when the car ... Most people will be inclided to add charge any time the performance of the automotive AC has decreased because the hoses ... The chart looks like normal values, but when the car was running ... AC on max, connect the kit, add until it reaches proper pressure. ... vehicle said max oil charge is 9oz. ... Squirt in a can on a cool motor (that's not running- duh) and reference a 134 temp/pressure chart. Here is an R12 chart for psi & dF. Shoot for at or slightly above 32dF refrigerant or 30-32 psi low side for the evaporator to deliver 36-40 dF air. During the winter (Dec, Jan, Feb) temperatures were about 20°C (68°F) and I was not driving a car heavily - mostly in evenings and AC seemed to ... The pressure inside the a/c system is a higher number in psi than the outside / ambient temperature number in Fahrenheit and it's above about 70F. With the fan on high, it's ~64°. Some things I've read say high side pressure should be roughly double the low side, plus fifty, which would ... Gauge pressure is the first tool in AC troubleshooting. The table below shows 7 Gauge Readouts that you may encounter. The R134a pressure chart delineates the relationship between pressure and temperature within an air conditioning system, utilizing R134a refrigerant. This chart ...