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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) >> Cooling is Poor [12/2019 - 10/2022] >> Description

Cooling is Poor [12/2019 - 10/2022]: Description

If the cooling effect of the air conditioning system is weak, the following factors may be the cause.

Symptom Factor
  • Cooling effectiveness is poor
  • Cooling response is slow
  • ECO mode control of air conditioning system is enabled
  • Compressor with pulley assembly malfunction
  • Refrigerant volume (high)
  • Refrigerant volume (low)
  • Clogged cooler condenser assembly fins
  • Cooling fan system malfunction
  • Mechanical locking of damper and damper link
  • High inlet air temperature
  • Harness or connector