1999 Lexus LS 400 Owners Manual - Page 244

AIR CONDITIONING AND AUDIO 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. When you turn the ignition switch on after the removal and installation of the battery terminal, the indicator light may flash and the operating sound of the motor may be heard. This does not indicate a malfunction. You may hear the operating sound of the motor about 70 seconds after the ignition switch is turned off. This is not also a malfunction. (c) Air filter The air filter may clog after long use and reduce air flow. You can inspect the filter easily. When you inspect and replace the air filter, be sure to turn off the fan. 21L010 1. Open the glove box and remove the two covers. 228