2017 Lexus LS460 AC Isn't Working

Troubleshooting Common AC Issues in Your 2017 Lexus LS460 and How to Restore Comfort

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Reviewed by
Andrew Hajjar
Written by RepairPal Car Genius
Updated January 14, 2025
0%
37% chance it's the
Refrigerant Leak
0%
21% chance it's the
Climate Control Electrical Issue
0%
12% chance it's the
AC Compressor
0%
30% chance it's
Something else
The most common reasons a 2017 Lexus LS460 AC isn't working are a refrigerant leak, an electrical climate control issue, or a problem with the air conditioning compressor.
  • Refrigerant Leak: A refrigerant leak can occur due to damaged hoses, seals, or connections, resulting in decreased cooling efficiency in the air conditioning system.
  • Climate Control Electrical Issue: A faulty climate control module or a blown fuse could be causing the electrical issues in the climate control system.
  • AC Compressor: A faulty AC compressor may be due to a lack of lubrication, electrical issues, or internal mechanical failure, resulting in inadequate cooling performance.
Proper diagnosis will determine the exact cause of your symptom, saving you money on unnecessary repairs. The diagnostic experts at RepairPal Certified shops have the right tools and experience to solve any symptom.

What are the initial steps to diagnose the AC issue in a 2017 Lexus LS460?

To diagnose the AC issue in your 2017 Lexus LS460, start by checking the air filters, as clean filters are crucial for proper airflow and cooling efficiency. Next, inspect the refrigerant levels; low refrigerant can significantly hinder the system's performance, so ensure they are within the recommended range. Following this, examine the AC compressor for any signs of damage or wear, as a malfunctioning compressor can prevent the system from cooling effectively. Additionally, test the thermostat to confirm it is regulating the vehicle's temperature accurately. Finally, look for any visible leaks in the AC system, which can often be identified by oily residue around connections or hoses. By systematically addressing these areas, you can effectively narrow down the potential causes of the AC issue and take the necessary steps toward a solution.

What are the common problems that could cause the AC to stop working in a 2017 Lexus LS460?

When troubleshooting the air conditioning system in a 2017 Lexus LS460, it's important to be aware of several common problems that could lead to a complete loss of cooling. One of the first things to check is the refrigerant levels; low refrigerant can significantly hinder the AC's ability to cool the air effectively. If the refrigerant is adequate, the next step is to inspect the compressor, as a faulty compressor can prevent the system from functioning altogether. Additionally, electrical issues such as blown fuses, malfunctioning relays, or damaged wiring can disrupt the AC's operation, so examining these components is crucial. Another potential issue is a clogged or leaking condenser, which can severely impact the system's cooling efficiency. Lastly, a defective thermostat may fail to regulate the temperature properly, further complicating the AC's performance. Addressing these common problems can help restore the functionality of your vehicle's air conditioning system, but for complex issues, consulting a qualified mechanic is recommended.

How urgent is it to address the AC failure in a 2017 Lexus LS460?

Addressing an AC failure in a 2017 Lexus LS460 is crucial for several reasons. First and foremost, a functioning air conditioning system is vital for maintaining a comfortable driving environment, particularly during hot weather or long trips. When the AC is not working, it can lead to discomfort for both the driver and passengers, detracting from the overall driving experience. Moreover, the safety implications cannot be overlooked; a malfunctioning AC can distract the driver, especially in extreme heat, which may impair focus and increase the risk of accidents. Additionally, neglecting AC issues can result in more severe damage to the system, leading to costly repairs down the line. Therefore, it is advisable to address any AC failures promptly to ensure comfort, maintain safety, and prevent further complications with the vehicle's air conditioning system.

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2017 Lexus LS460 AC Not Working? Common Issues & Solutions