2018 Mercedes-Benz Sprinter 3500 AC Isn't Working

Common Causes of AC Malfunctions in Your 2018 Mercedes-Benz Sprinter 3500 and How to Fix Them

Find Repair Location
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 2018 Mercedes-Benz Sprinter 3500 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 Sprinter 3500?

When faced with an AC malfunction in your 2018 Mercedes-Benz Sprinter 3500, it's crucial to adopt a systematic diagnostic approach. 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 an AC not functioning. Next, inspect the air filters; dirty or clogged filters can significantly restrict airflow, leading to poor cooling performance. If the filters are clean, proceed to examine the refrigerant levels, as low refrigerant can result in warm air blowing from the vents. Utilizing a pressure gauge can help you assess these levels, or you may choose to consult a professional if you're unsure. Additionally, look for any visible signs of leaks in the AC system, such as oily residue around hoses and connections, which can indicate refrigerant loss. The AC compressor is another critical component to check; ensure it engages properly when the AC is activated, as a malfunctioning compressor may require repair or replacement. Lastly, don't overlook the electrical components; inspect fuses, relays, and connections, as faulty electrical parts can prevent the AC from operating correctly. By following these steps, you can effectively diagnose common issues with your AC system, potentially saving time and money before deciding to seek professional assistance.

What are the common problems that could cause the AC system to fail in a 2018 Mercedes-Benz Sprinter 3500?

When dealing with the AC system in a 2018 Mercedes-Benz Sprinter 3500, it's essential to be aware of several common problems that can lead to system failure. One of the primary culprits is refrigerant leaks, which can significantly diminish cooling performance. If you notice a lack of cold air, checking for leaks in the system should be your first step. Another critical component is the compressor; if it malfunctions, the AC will struggle to produce cold air. Electrical issues, such as faulty wiring or sensors, can also disrupt the system's operation, so inspecting these components is vital. Additionally, blockages in the orifice tube or expansion valve can restrict refrigerant flow, leading to inadequate cooling. Lastly, ensure the condenser is in good condition, as any damage or clogs can hinder the heat exchange process necessary for effective cooling. By understanding these common issues and performing regular maintenance, you can keep your AC system running efficiently and avoid costly repairs.

How urgent is it to repair the non-functioning AC in a 2018 Mercedes-Benz Sprinter 3500?

When faced with a non-functioning AC in your 2018 Mercedes-Benz Sprinter 3500, it is crucial to recognize the urgency of the situation. A malfunctioning AC system not only compromises your comfort during hot weather but can also pose serious health risks, such as heat exhaustion or dehydration, especially during long drives. Moreover, neglecting this issue can adversely affect the vehicle's resale value, as a fully operational AC is a key feature for prospective buyers. Additionally, continuing to operate a vehicle with a faulty AC can lead to increased mechanical strain on other components, potentially resulting in more extensive and costly repairs down the line. Therefore, addressing the AC issue promptly is essential for ensuring a safe, comfortable, and reliable driving experience.

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.