Porsche 928 GTS 1994 Owner's Manual page 57

Additional vaporizer for increased
cooling output
In vehicles with increased cooling unit output
there is an additional vaporizer with a fan in-
stalled instead of the floor console.
When the air conditioner switch is pressed in,
and the air conditioner is turned on, the back
vaporizer can be switched on by turning the but-
ton at the left in the center console to the right.
Fan speeds from 1 to 3 can be adjusted.
58
Turning the button at the right to the right in-
creases the cooling output from the rear va-
porizer.
The inside air is drawn in through the rear grid,
cooled, and circulated in the floor area. If the
AC switch has not been pushed in, only circula-
tion of the air is provided.