Automotive AC Troubleshooting Pressure Charts as Your Ally

Shut the car off for 10 minutes then started AC compressor kicked on and got cold but gauge reading was off the chart. He recommended replacing ... 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. ... pressure drops and then you can compare readings to the R134a chart. ... An average automotive AC system can lose about 0.25 to 0.5 ounces ... The low side will get into upper 20's and when car gets cooler inside it will cycle off compressor at 22-24 psi and then come back on when ... 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 ... Like your engine oil dipstick, your air conditioning system does not have a set level. There is a range of low-side and high-side pressures that ... This document provides a temperature-pressure chart for R-134a that lists the expected gauge pressures at the low and high-pressure ports of an air ... 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 ... About the "ambient temperature" to use on the pressure charts ... It's hard to do ambient temp because the car needs to be moving for the AC to really be ... Turn the car on with your gauge hooked up there. IMO take the car to the shop... AC work is not something you should be doing without proper ...