2018 Mitsubishi Outlander Sport AC Isn't Working

Common Causes of AC Malfunctions in Your 2018 Mitsubishi Outlander Sport 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 2018 Mitsubishi Outlander Sport 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 2018 Mitsubishi Outlander Sport?

When diagnosing the AC issue in your 2018 Mitsubishi Outlander Sport, it's essential to adopt a systematic approach that prioritizes simpler checks before delving into more complex diagnostics. Start by inspecting the air filters, as dirty or clogged filters can significantly hinder airflow and affect the overall performance of your AC system. Next, assess the refrigerant levels; low levels may suggest a leak, which is a common issue in AC systems. Following this, examine the compressor for any signs of damage or malfunction, as it plays a critical role in the AC's operation. Additionally, test the thermostat to ensure it is functioning correctly, as a faulty thermostat can lead to inconsistent cooling. Be vigilant for any visible leaks around hoses or connections, as these can also indicate problems within the system. Finally, check the electrical components, including fuses and relays, to rule out any electrical issues that could be affecting the AC's performance. If these steps do not resolve the issue, it may be time to consult a professional mechanic or AC technician for further assistance. By following this diagnostic approach, you can effectively identify and address the AC problems in your vehicle.

What are the common problems that could cause the AC to stop working in a 2018 Mitsubishi Outlander Sport?

When your 2018 Mitsubishi Outlander Sport's AC system fails to cool, several common issues may be at play. Start by checking the refrigerant levels, as low refrigerant can significantly hinder cooling performance. If the refrigerant is adequate, the next step is to inspect the compressor; a faulty compressor can prevent the system from circulating refrigerant effectively. Additionally, electrical problems such as blown fuses or damaged wiring can disrupt the AC's operation, so it's wise to examine these components as well. Another area to investigate is the condenser; if it is clogged or leaking, it will struggle to cool the air properly. Lastly, ensure that the cooling fans are functioning correctly, as broken fans can lead to insufficient airflow and cooling. By systematically checking these common issues, you can identify the root cause of your AC problems and determine whether a DIY fix is feasible or if professional assistance is needed.

How urgent is it to repair the non-functioning AC in a 2018 Mitsubishi Outlander Sport?

Repairing the non-functioning AC in your 2018 Mitsubishi Outlander Sport should be treated as an urgent matter due to several critical factors. First and foremost, a functioning AC system is vital for maintaining comfort during hot weather, especially on long drives where discomfort can lead to distractions and even health risks. Additionally, the safety of all passengers is at stake; high temperatures can exacerbate heat-related illnesses, particularly for vulnerable individuals such as children or the elderly. Beyond immediate comfort and safety concerns, neglecting AC repairs can adversely affect the vehicle's resale value. A well-maintained AC system is often a key selling point for potential buyers, and any issues can deter interest or lower the car's market value. Furthermore, ignoring AC problems can lead to more significant mechanical issues down the line, potentially causing damage to other vehicle components. Therefore, addressing AC issues promptly is essential not only for a pleasant driving experience but also for the long-term health and value 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.

2018 Mitsubishi Outlander Sport AC Not Working | RepairPal