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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Heating / Air Conditioning System (Except HV, W/ Manual A/C) - Diagnostic Codes, Circuit Tests & Symptom Tests >> AIR CONDITIONING SYSTEM (for Gasoline Model with Manual Air Conditioning System) >> Recirculated/Fresh Air Modes Switch without User Input [12/2019 - 10/2022] >> Description

Recirculated/Fresh Air Modes Switch without User Input [12/2019 - 10/2022]: Description

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
  • Change in ambient air temperature
  • Decrease in refrigerant pressure
  • Air conditioner pressure sensor circuit malfunction
  • Engine coolant temperature (high)
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