2018 Mercedes-Benz GLE43 AMG AC Isn't Working

Common Causes of AC Issues in Your 2018 Mercedes-Benz GLE43 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 2018 Mercedes-Benz GLE43 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 diagnostic steps to take when the AC isn't working in a 2018 Mercedes-Benz GLE43 AMG?

When your 2018 Mercedes-Benz GLE43 AMG's AC system fails to cool, start by checking the thermostat settings to ensure they are correctly adjusted to a cool temperature, as incorrect settings can often be the simplest explanation for the issue. Next, inspect the air filters; dirty or clogged filters can significantly restrict airflow, leading to poor AC performance. If the filters are clean, examine the refrigerant levels, as low refrigerant can result in warm air blowing from the vents. If you suspect a refrigerant issue, look for any visible signs of leaks around the AC system, such as oily residue, which can indicate a loss of refrigerant. Additionally, test the compressor to ensure it engages when the AC is activated; a malfunctioning compressor may require repair or replacement. Finally, check the electrical connections related to the AC system for any loose or damaged wires, as faulty connections can prevent the system from operating correctly. By systematically following these steps, you can effectively diagnose and address common AC issues in your vehicle.

What are the common problems that could cause the AC system to stop working in a 2018 Mercedes-Benz GLE43 AMG?

When tackling AC issues in a 2018 Mercedes-Benz GLE43 AMG, it's essential to understand the common problems that may arise. One prevalent issue is refrigerant leaks, which can occur in various components such as hoses or the compressor, leading to diminished cooling efficiency. Another critical factor is the compressor itself; if it malfunctions, the system cannot circulate refrigerant effectively, resulting in a complete loss of cooling. Additionally, electrical problems, including blown fuses or faulty wiring, can disrupt the AC's operation, making it crucial to check these components. Clogged expansion valves or orifice tubes can also impede refrigerant flow, causing poor performance or total failure of the AC system. Lastly, a faulty blower motor can prevent cold air from entering the cabin, further exacerbating the issue. By identifying these common problems, DIY enthusiasts can take the first steps toward diagnosing and potentially resolving AC issues in their vehicle.

How urgent is it to address the non-functioning AC in a 2018 Mercedes-Benz GLE43 AMG?

Addressing a non-functioning AC in your 2018 Mercedes-Benz GLE43 AMG is not just a matter of comfort; it is a critical issue that requires immediate attention. A malfunctioning AC system can lead to an uncomfortable driving experience, especially during sweltering summer months, making long trips unbearable. More importantly, the safety implications cannot be overlooked; a faulty AC can cause windows to fog up, severely impairing visibility and increasing the risk of accidents. Additionally, neglecting AC issues can result in further damage to the system, leading to more extensive and costly repairs in the future. Lastly, maintaining the functionality of your vehicle's components, including the AC, is essential for preserving its resale value. Therefore, it is crucial to act promptly and seek professional assistance to ensure your vehicle remains safe, comfortable, and valuable.

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