Service Port HVAC: Description and Operation

High Pressure Service Valve:

A - Service valve connection (soldered to front of condenser)
B - Schrader valve insert
C - O-ring
D - Cap with seal

- Use only the specified R-134a quick coupling connectors when servicing the refrigerant system
- Before removing the valve insert from the service valve, discharge A/C refrigerant system
- Always reinstall cap -D- over service valve

NOTE:
- Image shows the condenser and service valve of an Audi 100 model
- Only a high pressure service valve is used for A/C system servicing. A low pressure service valve is not installed in the A/C system. Carry out all A/C system service operations (i.e. discharging, evacuating, and charging) through the high pressure service valve only.