A/C refrigerant system, checking pressures: Notes
WARNING: This page is about a different car, the 2004 Audi S4, 2004 Audi A4, 2003 Audi A4, and 2002 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.
Safety measures, see SAFETY PRECAUTIONS .
Before checking refrigerant system pressures, check A/C system cooling performance. See A/C REFRIGERANT SYSTEM COOLING PERFORMANCE, TESTING .
Use high pressure service valve for checking system pressures.