Automotive AC Optimization A Pressure Chart for Peak Performance

This AC pressure chart contains R134a refrigerant values at room temperature. Where all the high- and low-side pressure values are. IMMEDIATELY after the car is started, turn on the A/C. It should be cold air almost immediately. This test will rule out any "stuck open" heater ... 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. AC pressure readings for R1234yf ; S · stevj. 60 posts ; S · stevj. 60 posts ; B · Blackhawk · 280 posts ; Rusty289. 688 posts ; B · Blackhawk · 280 posts ... Measure the ambient temperature and compare the reading with the pressure-temperature chart of R134a below: In my case, the ambient temperature ... If the Ac high pressure side is only at 175 psi and the low is 33psi ... do you have a copy of the values chart you used? img. logo. Ford ... Gauge pressure is the first tool in AC troubleshooting. The table below shows 7 Gauge Readouts that you may encounter. You can check your pressure readings against the infographic above/chart below to narrow down the problem and remedy for your AC Compressor. Common Diagnosis of Car Ac Problems · Not Enough Refrigerant or Failing Compressor · Failing Expansion Valve · Abnormal Low Pressure/High-Pressure ... Before the vehicle is started, the static system pressure can be read. ... The PCM gets inputs from the HVAC switch, and from the AC pressure ...