Buster CT1K Posted February 4, 2013 Share Posted February 4, 2013 I prefer to keep the HVAC in internal-recirculating mode to avoid inhalation of external pollutants, such as car fumes. My 2013 Lexus RX 350 keeps automatically switching to the mode where external air is used. How do I stop it from doing this? Quote Link to comment Share on other sites More sharing options...
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