I wonder why it turns off after 3 minutes. Is outside air automatically filtered when the setting is set to outside air?From an old thread with the same question:
Filtered air? If so, is the air not always filtered?www.ct200hforum.com
The manual from the online Lexus service says:
"Micro dust and pollen filter button.
Operates micro dust and pollen filter on/off. Outside air mode switches to (recirculated air) mode. Pollen is removed from the air and the air flows to the upper part of the body. Usually the system will turn off automatically after approximately 3 minutes."