Recirculated/Fresh Air Modes do not Switch [10/2022 - ]: Description

WARNING: This page is about a different car, the 2025 Lexus RX 350, 2024 Lexus RX 350, and 2023 Lexus RX 350. However, it is still accessible from the selected car via links, so may be relevant.

If the air inlet mode cannot be changed between recirculation/fresh or exhaust gas odors can be smelled even though recirculation mode is selected, the following factors may be the cause.

Symptom	Factor
Air inlet mode cannot be changed between recirculation/fresh Exhaust gas odors can be smelled when air inlet mode set to recirculation mode	No. 5 air conditioning radiator damper servo sub-assembly malfunction Damper link disconnection Air inlet damper mechanically locked Air conditioner unit assembly malfunction Engine coolant temperature (high) Smog ventilation sensor*

*: w/ Smog ventilation sensor