Lexus RX300 2003 Owner's Manual page 178

If manual switching of air intake is desired –
20R007a
The air intake control button is used to switch the air intake
between the OUTSIDE AIR mode and RECIRCULATED AIR
mode. The indicator on the switch shows which mode is
selected.
D With the indicator on – For RECIRCULATED AIR mode
D With the indicator off – For OUTSIDE AIR mode
For normal use, it is best to keep the setting to OUTSIDE AIR
mode. If RECIRCULATED AIR mode is used during heating,
the windows will fog up more easily.
If the engine coolant temperature becomes extremely high, the
RECIRCULATED AIR mode is automatically selected. This is
not a malfunction. When the engine coolant temperature is
lowered, the previous mode resumes.
To prevent fogging up of the windshield, the air intake mode
may change automatically to OUTSIDE AIR mode depending
on the condition of the air conditioning system.
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
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.
2003 RX300 from Aug. 02' Prod. (OM48442U)
including cooling and