Service Port HVAC: Locations

A High pressure connection
B Low pressure connection
B12 Refrigerant pressure sensor
B12/1 Refrigerant temperature sensor
1 A/C compressor
2 High pressure vapor line to condenser
3 Condenser
4 High pressure liquid line to Receiver/dryer
5 Receiver/driver
6 High pressure line to evaporator
7 Low pressure line to evaporator
8 Expansion valve
9 Evaporator
10 Low pressure line to A/C compressor