Front Window Fogging [10/2022 - ]: Description

WARNING: This page is about a different car, the 2025 Lexus RX 350, 2024 Lexus RX 350, and 2023 Lexus RX 350. However, it is still accessible from the selected car via links, so may be relevant.

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