2019 Mercedes-Benz GLS63 AMG AC Isn't Working

Common Causes of AC Malfunctions in Your 2019 Mercedes-Benz GLS63 AMG and How to Resolve Them

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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 2019 Mercedes-Benz GLS63 AMG 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 2019 Mercedes-Benz GLS63 AMG?

When diagnosing an AC issue in a 2019 Mercedes-Benz GLS63 AMG, it's crucial to follow a structured diagnostic approach that begins with the most straightforward checks. Start by inspecting the air filters, as dirty or clogged filters can significantly restrict airflow and diminish cooling performance. Next, verify the refrigerant levels; low refrigerant can lead to insufficient cooling, so ensuring they are at the proper level is essential for optimal function. After that, examine the AC compressor for any signs of damage or wear, as a faulty compressor can severely affect the system's overall performance. Testing the thermostat is also important to ensure it is accurately regulating the temperature inside the vehicle. Additionally, check for any leaks in the AC system, as refrigerant loss can drastically reduce cooling efficiency. Finally, using a diagnostic scanner to check for error codes can help identify any hidden issues that may not be immediately visible. By systematically addressing these areas, you can effectively diagnose and resolve AC problems in your Mercedes-Benz GLS63 AMG.

What are the common problems that could cause the AC to stop working in a 2019 Mercedes-Benz GLS63 AMG?

When the air conditioning system in your 2019 Mercedes-Benz GLS63 AMG fails to cool, several common issues may be at play. Start by checking the refrigerant levels, as low refrigerant can significantly impair cooling performance. If the refrigerant is adequate, the next step is to inspect the compressor, which is crucial for circulating the refrigerant; a faulty compressor can prevent the AC from functioning altogether. Additionally, electrical problems such as blown fuses or damaged wiring can disrupt the system's operation, so it's wise to examine these components as well. Clogged or leaking refrigerant lines can also hinder performance, so look for any visible signs of leaks or blockages. Lastly, consider the condition of the condenser and evaporator, as defects in these parts can severely limit cooling capacity. By systematically checking these areas, you can identify the root cause of the AC failure and determine whether a DIY fix is feasible or if professional assistance is necessary.

How urgent is it to repair the non-functioning AC in a 2019 Mercedes-Benz GLS63 AMG?

When faced with a non-functioning AC in a 2019 Mercedes-Benz GLS63 AMG, the urgency of repair cannot be overstated. The comfort of both the driver and passengers is significantly compromised, especially during sweltering summer months or on long journeys, where the cabin can quickly become stifling. Beyond mere comfort, safety is a critical concern; a malfunctioning AC can lead to fogged windows, severely impairing visibility and increasing the risk of accidents. Additionally, neglecting AC repairs can result in minor issues escalating into major mechanical failures, leading to costly repairs down the line. For owners looking to maintain the vehicle's resale value, ensuring that all systems, including the AC, are in optimal working condition is vital. A well-maintained luxury vehicle is more appealing to potential buyers, making timely AC repairs not just a matter of comfort and safety, but also a smart financial decision.

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