2020 Mercedes-Benz GLB250 AC Isn't Working

Common Causes of AC Malfunctions in Your 2020 Mercedes-Benz GLB250 and How to Fix Them

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Reviewed by
Aisha
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 2020 Mercedes-Benz GLB250 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 steps should I take to diagnose the AC issue in my 2020 Mercedes-Benz GLB250?

When diagnosing an AC issue in your 2020 Mercedes-Benz GLB250, it's essential to adopt a systematic approach that begins with the simplest checks before moving on to more complex diagnostics. Start by inspecting the air filters, as clean filters are crucial for optimal airflow; if they are dirty or clogged, replacing them can significantly improve AC performance. Next, verify the refrigerant levels in the system, since low refrigerant can lead to inadequate cooling. If the refrigerant is sufficient, examine the AC compressor for any signs of damage or wear, as a malfunctioning compressor can severely impact cooling efficiency. Additionally, ensure that the thermostat is functioning correctly, as it plays a vital role in regulating the vehicle's internal temperature. While inspecting, keep an eye out for any visible leaks around hoses or connections, as these can lead to refrigerant loss. Finally, monitor the cooling performance while driving to identify any inconsistencies. If these steps do not resolve the issue, it may be time to consult a qualified mechanic or AC specialist for a more thorough diagnosis and repair. By following this structured diagnostic approach, you can effectively identify and address AC issues in your vehicle.

What are the common problems that could cause the AC to stop working in a 2020 Mercedes-Benz GLB250?

When the air conditioning system in your 2020 Mercedes-Benz GLB250 ceases to function, it can be frustrating, especially during hot weather. One of the most frequent culprits is low refrigerant levels, which can significantly hinder the system's ability to cool the air effectively. If you notice that the AC is blowing warm air, checking the refrigerant levels should be your first step. Another common issue is a faulty compressor; if the compressor is not engaging, it will prevent cold air from circulating. Additionally, electrical problems, such as blown fuses or damaged wiring, can disrupt the AC's operation, so inspecting these components is crucial. A clogged or leaking condenser can also impede airflow and cooling efficiency, making it essential to examine this part for any blockages or damage. Lastly, a defective thermostat may fail to regulate the temperature properly, leading to inconsistent cooling. By understanding these common problems, you can better diagnose the issue and determine whether a DIY fix is feasible or if professional assistance is required.

How urgent is it to address the non-functioning AC in a 2020 Mercedes-Benz GLB250?

Addressing a non-functioning AC in your 2020 Mercedes-Benz GLB250 should be considered a priority, even if it may not seem like an immediate emergency. The discomfort caused by inadequate climate control can significantly detract from your driving experience, particularly during extreme weather conditions. Moreover, a malfunctioning AC system could indicate deeper issues within the vehicle's cooling system, which, if left unattended, may lead to more severe damage and costly repairs. Additionally, driving without a properly functioning AC can not only affect your comfort but also impact the resale value of your vehicle. Regular maintenance and prompt attention to AC issues are essential for ensuring the longevity of your vehicle's cooling system and maintaining its overall performance. Therefore, while it may not require immediate action, addressing the non-functioning AC promptly is crucial for your comfort, safety, and the long-term health of your vehicle.

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