Volkswagen Passat 1995 Official Factory Repair Manual page 4158

A/C refrigerant system
http://ebahn.bentleypublishers.com/vw/servlet/Display?action=Goto&type=repair&id=VW.B4.HA01.87.4
Condenser
The condenser transfers heat from the compressed
refrigerant gas to the outside air which causes the
refrigerant to change state from a gas to a liquid.
Expansion valve
The expansion valve restricts and controls refrigerant
flow to the evaporator thus lowering refrigerant
temperature and pressure.
Upstream of the expansion valve, the refrigerant is
hot and under high pressure. Downstream of the
expansion valve, the refrigerant is cold and under low
pressure.
Page 3 of 7
87-64
12/7/2004