2013 Lexus ES 350 Owners Manual - Page 1149

1. AIR CONDITIONING SYSTEM OPERATION USING AUTOMATIC MODE Fan speed is adjusted automatically according to the temperature setting and the ambient conditions. Therefore, the fan may stop for a while until warm or cool air is ready to flow immediately after "AUTO" is pressed. WINDSHIELD FOG DETECTION FUNCTION* When automatic mode is set, the humidity sensor (see page 305) detects fog on the windshield and controls the air conditioning system to prevent fog. FOGGING UP OF THE WINDOWS The windows will easily fog up when the humidity in the vehicle is high. Selecting "A/C" on will dehumidify the air from the outlets and defog the windshield effectively. If "A/C" is switched off, the windows may fog up more easily. The windows may fog up if the recirculated air mode is used. OUTSIDE/RECIRCULATED AIR MODE When driving on dusty roads such as tunnels or in heavy traffic, set the outside/ recirculated air mode button to the recirculated air mode. This is effective in preventing outside air from entering the vehicle interior. During cooling operation, setting the recirculated air mode will also cool the vehicle interior effectively. Outside/recirculated air mode may automatically switch depending on the temperature setting or the inside temperature. 6 AIR CONDITIONING CAUTION ● To prevent the windshield from fogging up • Do not use the windshield air flow button during cool air operation in extremely humid weather. The difference between the temperature of the outside air and that of the windshield can cause the outer surface of the windshield to fog up, blocking your vision. *: If equipped 303 ES350/300h_Navi_OM33A07U_(U) 12.05.11 08:14