1998 Lexus LS 400 Owners Manual - Page 185

AIR CONDITIONING AND AUDIO (b) Windshield defogging and defrosting 21L009-3 To remove interior fog on the windshield - Push the"FRONT WINDSHIELD" button. To remove frost or exterior fog on the windshield - 1. Place the temperature control button at the maximum temperature. 2. Push the "FRONT WINDSHIELD" button. 3. Push the fan speed control button on the right side to obtain a maximum air flow. 4. Leave the air conditioning on-off button off. When the "FRONT WINDSHIELD" button is pushed while operating in automatic mode, the air conditioning is set to operate and the OUTSIDE AIR mode is set. If you push the "FRONT WINDSHIELD" button once again while in the FRONT WINDSHIELD mode, the mode then returns to the last mode used. CAUTION Do not use the "FRONT WINDSHIELD" button during cooled air operation in extremely humid weather. The difference between the temperature of the outside air and that of the windshield could cause the outer surface of the windshield to fog up blocking your vision. 185