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Home >> Chevrolet >> 1995 >> Lumina Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 24 (A/C-Heater System - Automatic) >> Operation >> A/C-Heater Control Unit >> DEF Mode

DEF Mode

WARNING: This page is about a different car, the 1995 Oldsmobile Cutlass Supreme. However, it is still accessible from the selected car via links, so may be relevant.

In defrost mode, system turns on blower motor. Blower speed can be manually adjusted by turning fan speed knob. When in defrost mode, air flows from defroster openings. System is automatic in this mode, as A/C compressor and air inlet are controlled automatically.

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