Automotive AC Mastery Unleashing the Potential of Pressure Charts

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 ... The rule of thumb I use to start with for STATIC cold system pressure is Ambient -10. So 70F get 60 PSI static on the low side. This is just a starting point. The low pressures may drop to 30psi and the high side could be as much as 230 psi or even more. But, a system that is low on refrigerant the low ... Automotive AC Pressure Chart for R134a Refrigerant | Ideal High and Low Pressure Readings Explained. 479 views · 2 months ago ...more ... My MK3 GTI Ac system has recently stopped cooling down the car. Air blows out at a constant 80 deg F. (It's Florida) I have a set of gauges ... ... 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 ... 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 ... Also remember all these pressure charts ... The other day, I spoke with a guy who does auto AC work and he said something very interesting. The R134a pressure chart delineates the relationship between pressure and temperature within an air conditioning system, utilizing R134a refrigerant. This chart ... If the pressure readings to the ambient temperatures are different to these, then the system is probably defective. Note: Pressure gauge readings (low and high) ...