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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) >> Front Window Fogging [06/2018 - ] >> Description

Front Window Fogging [06/2018 - ]: Description

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If the windshield frequently fogs up even though the air conditioning system is operating, the following factors may be the cause.

Symptom Factor
Windshield frequently fogs up
  • Cooler compressor assembly malfunction
  • Refrigerant volume (low)
  • Cooler expansion valve (opened excessively)
  • No. 1 air conditioning radiator damper servo sub-assembly malfunction
  • Mechanical locking of damper and damper link
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