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Home >> Lexus >> 2020 >> ES 300h Luxury >> Repair and Diagnosis >> External Pages >> Different car >> Section 219 (Heating / Air Conditioning System (Except Hybrid) - Diagnostic Codes & Symptom Tests) >> AIR CONDITIONING SYSTEM (for Gasoline Model) >> Recirculated/Fresh Air Modes Switch without User Input [08/2020 - ] >> Description

Recirculated/Fresh Air Modes Switch without User Input [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 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 conditioner pressure sensor circuit malfunction
  • Engine coolant temperature (high)
  • Smog ventilation sensor
  1. *: except USA and Canada
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