A/C Switch Indicator does not Turn On [12/2023 - ]: Description

WARNING: This page is about a different car, the 2024 Lexus TX 550h+. However, it is still accessible from the selected car via links, so may be relevant.

If none of the switch indicators on the radio and display receiver assembly illuminate, the following factors may be the cause.

Malfunction Status	Factor
A/C switch indicator does not illuminate	Air conditioning amplifier assembly malfunction Radio and display receiver assembly malfunction Servo motor initialization (incomplete) Mechanical locking of damper and damper link Refrigerant pressure is extremely low Low detected ambient temperature (including thermistor assembly malfunction)