2008 Lexus RX 350 Navigation Manual - Page 271

RX350_Navi_U (L/O 0612) AIR CONDITIONING 271 If manual on-off of the air conditioning is desired - (b) Windshield defogging and defrosting To remove interior fog on the windshield - Touch "A/C" to turn the air conditioning on and touch it again to turn the air conditioning off. The air conditioning does not work if the outside temperature is lowered down to around 0_C (32_F). If the system is used for ventilation, heating in dry weather or removing frost or exterior fog on the windshield, turn the air conditioning off once it is no longer required. This will improve fuel economy. The air conditioning can be used for yearround automatic temperature control including cooling and dehumidifying operation. If the air conditioning compressor does not operate, the indicator of "A/C" will blink. If the indicator of "A/C" blinks even when "A/C" is touched again, have the compressor checked by your Lexus dealer. If the engine coolant temperature becomes extremely high, the air conditioning may shut off automatically to resolve emergency situation for engine cooling. This is not a malfunction. When the engine coolant temperature is lowered, the air conditioning comes on automatically. Push the windshield air flow button.