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Home >> Lexus >> 2025 >> NX 350h >> Repair and Diagnosis >> External Pages >> Different car >> Section 71 (Heating / Air Conditioning System - Diagnostic Codes, Circuit Tests & Symptom Tests) >> AIR CONDITIONING SYSTEM (for Gasoline Model) >> Front Window Fogging [11/2021 - ] >> Description

Front Window Fogging [11/2021 - ]: 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
  • Compressor with pulley assembly malfunction
  • Refrigerant volume (low)
  • Cooler expansion valve (opened excessively)
  • Damper servo malfunction
  • Mechanical locking of damper and damper link
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