2017 Mercedes-Benz GLC300 AC Isn't Working

Common Causes of AC Malfunctions in Your 2017 Mercedes-Benz GLC300 and How to Fix Them

Find Repair Location
Reviewed by
Devin Cabugcal
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 Mercedes-Benz GLC300 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 2017 Mercedes-Benz GLC300?

When faced with an AC malfunction in your 2017 Mercedes-Benz GLC300, start by checking the thermostat settings to ensure they are correctly adjusted. A simple misconfiguration can often be the culprit behind inadequate cooling. Next, inspect the air filters; if they are dirty or clogged, replacing them can significantly improve airflow and system performance. It's also crucial to examine the refrigerant levels, as low levels can hinder cooling efficiency. If you suspect a leak, look for oily residues around the AC connections and hoses, as these can indicate a problem that needs addressing. Additionally, test the compressor to confirm it engages when the AC is activated; a malfunctioning compressor may require repair or replacement. Lastly, ensure that all electrical connections related to the AC system are secure and free from corrosion, as faulty connections can disrupt functionality. By systematically following these steps, you can effectively diagnose and potentially resolve common AC issues in your vehicle.

What are the common problems that could cause the AC to stop working in a 2017 Mercedes-Benz GLC300?

When troubleshooting the AC system in a 2017 Mercedes-Benz GLC300, it's essential to consider several common problems that could lead to a malfunction. One of the first things to check is the refrigerant level; low refrigerant can significantly impair cooling performance, so ensuring it's adequately filled is crucial. If the refrigerant is sufficient, the next step is to inspect the compressor, as a faulty compressor can prevent the AC from functioning altogether. Additionally, electrical issues such as blown fuses or damaged wiring can disrupt the system's operation, making it vital to examine these components. Another potential issue is a clogged or leaking condenser, which can hinder the AC's ability to cool effectively. Lastly, a defective blower motor may be responsible for inadequate air circulation, further complicating the cooling process. By systematically checking these areas, DIYers can identify and address the root cause of their AC problems, potentially saving on repair costs and restoring comfort to their vehicle.

How urgent is it to address the AC failure in my 2017 Mercedes-Benz GLC300?

When faced with an AC failure in your 2017 Mercedes-Benz GLC300, the urgency to address the problem cannot be overstated. A malfunctioning air conditioning system can significantly diminish your driving comfort, especially during sweltering summer months or on long journeys. Moreover, the lack of a functional AC can lead to distractions that compromise your focus on the road, particularly in extreme heat conditions, thereby posing safety risks. Timely repairs not only enhance your immediate driving experience but also serve as a form of preventive maintenance, helping to avert more severe and costly issues that could arise from neglecting the problem. Additionally, maintaining your vehicle's AC system in good working order is essential for preserving its resale value; potential buyers are likely to be deterred by a vehicle with known AC issues. Therefore, addressing AC failures promptly is vital for ensuring comfort, safety, and the long-term health of your vehicle.

You’ve got options with RepairPal

Whether you need a more accurate auto repair estimate or help finding a reputable shop in your area, we’ve got you covered.