Test procedure

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Switch fresh air blower switch -E9- to "0" (OFF) position.

Fig 1: A/C System Operation Troubleshooting - Fresh Air Cannot Be Shut Off (1993 M.Y.)

Courtesy of VOLKSWAGEN OF AMERICA, INC.

NOTE: The position of the other two ventilation control knobs does not affect fresh air cut-off.

Check components and specified functions using table FRESH AIR CANNOT BE SHUT OFF (1993 M.Y.) :

FRESH AIR CANNOT BE SHUT OFF (1993 M.Y.)

Components	Specified function and check	Remedy if specified function not obtained
1 - Fresh air/recirculating flap	Fresh air inlet (arrow) closed to outside air	Check fresh air/recirculating flap two -way valve -N63- according to wiring diagram
1 - Fresh air/recirculating flap	Vacuum servo -2- retracted (vacuum applied)	Check vacuum hoses and connections according to vacuum hose layout, refer to VACUUM HOSE LAYOUT