Recirculated/Fresh Air Modes Switch without User Input [08/2023 - ]: Description

WARNING: This page is about a different car, the 2025 Lexus RX 450h+ and 2024 Lexus RX 450h+. However, it is still accessible from the selected car via links, so may be relevant.

If recirculation/fresh mode changes unintentionally and without permission, the following causes are possible.

Symptom	Factor
Recirculation/fresh mode changes without permission Recirculation/fresh mode light blinks	Customize setting Change in ambient air temperature Decrease in refrigerant pressure Air conditioning pressure sensor circuit malfunction Engine coolant temperature (high) Smog ventilation sensor*

*: w/ Smog ventilation sensor