Service Port HVAC: Locations

A High pressure connection
B Low pressure connection (engine 112)
B12 Refrigerant pressure sensor
B2/11 Refrigerant temperature sensor
1 A/C compressor
2 High pressure vapor line to condenser
3 Condenser
4 Low pressure line to A/C compressor
5 Receiver/dryer
6 Low pressure line
7 Low pressure line to evaporator
8 Expansion valve
9 Evaporator