A/C Switch Indicator does not Turn On [06/2018 - ]: Description

WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 2024 Lexus ES 350, 2024 Lexus ES 250, 2023 Lexus ES 350, 2023 Lexus ES 250, and 2022 Lexus ES 350. However, it is still accessible from the selected car via links, so may be relevant.

If none of the switch indicators on the air conditioning control assembly illuminate, the following factors may be the cause.

Symptom	Factor
A/C switch indicator does not illuminate	Air conditioning amplifier assembly malfunction Air conditioning control assembly malfunction A/C switch malfunction A/C switch indicator malfunction (including when indicator turned off without switch operation) Servo motor initialization (incomplete) Mechanical locking of damper and damper link Refrigerant pressure is extremely low Low detected ambient temperature (including thermistor assembly malfunction)

Symptom

Factor

A/C switch indicator does not illuminate

Air conditioning amplifier assembly malfunction
Air conditioning control assembly malfunction
A/C switch malfunction
A/C switch indicator malfunction (including when indicator turned off without switch operation)
Servo motor initialization (incomplete)
Mechanical locking of damper and damper link
Refrigerant pressure is extremely low
Low detected ambient temperature (including thermistor assembly malfunction)