Recirculated/Fresh Air Modes do not Switch [06/2018 - 08/2020]: Description

WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 2024 Lexus ES 350, 2024 Lexus ES 250, 2023 Lexus ES 350, 2023 Lexus ES 250, and 2022 Lexus ES 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. 1 blower damper servo sub-assembly malfunction Damper link disconnection Air inlet damper mechanically locked Engine coolant temperature (high) Air conditioner unit assembly malfunction Smog ventilation sensor