Windshield Fog Detection Function; Outside/Recirculated Air Mode; When The Outside Temperature Is Low; Ventilation And Air Conditioning Odors - Lexus RX 450H Owner's Manual

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5-2. Using the air conditioning system and defogger

Windshield fog detection function

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When automatic mode is set, the humidity sensor (→P. 415) detects fog on the wind-
shield and controls the air conditioning system to prevent fog.

Outside/recirculated air mode

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When driving on dusty roads such as tunnels or in heavy traffic, set the outside/recircu-
●
lated air mode button to the recirculated air mode. This is effective in preventing out-
side 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 tempera-
●
ture setting or the inside temperature.

When the outside temperature is low

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The dehumidification function may not operate even when "A/C" is selected.
Operation of the air conditioning system in Eco drive mode
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In the Eco drive mode, the air conditioning system is controlled as follows to prioritize
●
fuel efficiency
• Engine speed and compressor operation controlled to restrict heating/cooling
capacity
• Fan speed restricted when automatic mode is selected
To improve air conditioning performance, perform the following operations
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• Adjust the fan speed
• Turn off Eco drive mode

Ventilation and air conditioning odors

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To let fresh air in, set the air conditioning system to the outside air mode.
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During use, various odors from inside and outside the vehicle may enter into and accu-
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mulate in the air conditioning system. This may then cause odor to be emitted from the
vents.
To reduce potential odors from occurring:
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• It is recommended that the air conditioning system be set to outside air mode prior
to turning the vehicle off.
• The start timing of the blower may be delayed for a short period of time immediately
after the air conditioning system is started in automatic mode.
Air conditioning filter
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→P. 503
Customization
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Some functions can be customized (→P. 607)
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