Volkswagen Golf 1999 Service Manual page 3862

1.8 l turbo, 1.9 l tdi and pdi diesel. 2.0l gasoline, 2.8l vr6

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A/C refrigerant system

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Expansion valve

The expansion valve restricts and

controls refrigerant flow to the

evaporator thus lowering refrigerant

temperature and pressure.

The R-134a expansion valve may be

identified as such with a label.

Liquid refrigerant entering the

evaporator absorbs heat from air

passing through the evaporator fins

and cools the air. As the refrigerant

absorbs heat it turns to vapor and

then is suctioned by the

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