Lexus LX 470 1998 Owner's Manual page 157

AIR CONDITIONING AND AUDIO
If manual on−off of the air conditioning is desired −
Push the "A/C" button to turn the air conditioning on and push 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 year−round
automatic temperature control including cooling and dehumidifying
operation.
If the air conditioning compressor does not operate, the indicator of
the "A/C" button will blink. If the indicator of the "A/C" button
blinks even when the "A/C" button is pushed again, have the
compressor checked by your nearest Lexus dealer.
140
(b) Windshield defogging and defrosting
20X024a
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 lever at the maximum temperature.
2. Push the "FRONT WINDSHIELD" button.
3. Push the "HI" button of the fan speed control button 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.