2018 Mitsubishi Outlander PHEV AC Isn't Working

Common Causes of AC Issues in Your 2018 Mitsubishi Outlander PHEV and How to Resolve Them

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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 PHEV 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 steps to diagnose the AC issue in a 2018 Mitsubishi Outlander PHEV?

To effectively diagnose the AC issue in your 2018 Mitsubishi Outlander PHEV, start by checking the air filters, as dirty or clogged filters can significantly restrict airflow and diminish cooling performance. Next, inspect the refrigerant levels; low levels may indicate a leak, which is crucial to address for optimal AC function. Following this, examine the compressor for any signs of damage or malfunction, as it plays a vital role in the cooling process. Testing the thermostat is also essential, as a faulty unit can disrupt temperature regulation. Additionally, look for any visible leaks in the AC system, which could be contributing to the problem. Ensure that all electrical components are secure and functioning properly, as any loose connections can hinder the system's performance. If these steps do not resolve the issue, it may be time to consult a professional mechanic or HVAC technician for further assistance. By systematically addressing these areas, you can effectively diagnose and potentially resolve AC issues in your vehicle.

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

When the air conditioning system in your 2018 Mitsubishi Outlander PHEV ceases to function, it can be frustrating, but understanding the common problems can help you diagnose the issue effectively. One of the primary culprits is low refrigerant levels, which can significantly impair the system's cooling ability. If the refrigerant is low, it may indicate a leak that needs to be addressed. Another frequent issue is a faulty compressor; if the compressor is not operating correctly, it can prevent the system from circulating refrigerant, leading to inadequate cooling. Additionally, electrical problems such as blown fuses or damaged wiring can disrupt the AC's functionality, so checking these components is essential. Clogged or blocked condensers can also hinder performance, as debris accumulation can obstruct airflow and cooling efficiency. Lastly, a malfunctioning thermostat may fail to regulate the temperature properly, further complicating the AC's operation. By being aware of these common problems, you can take the necessary steps to troubleshoot and potentially resolve the AC issues in your vehicle.

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

When your 2018 Mitsubishi Outlander PHEV's air conditioning system fails, the urgency to address the issue cannot be overstated. Driving without a functioning AC in hot weather can lead to severe discomfort and even health risks, particularly for vulnerable individuals such as children and the elderly. Moreover, a malfunctioning AC may signal deeper problems within the vehicle's cooling system, which, if ignored, could result in overheating and potential engine damage. Additionally, if the AC failure is due to a refrigerant leak, it poses environmental hazards that necessitate immediate attention. By prioritizing the repair of your AC system, you not only enhance your driving comfort but also prevent further damage that could lead to costly repairs down the line. Therefore, addressing a non-functioning AC should be seen as a critical step in maintaining the overall health and safety of your vehicle.

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