2018 Mitsubishi Eclipse Cross AC Isn't Working

Common Causes of AC Malfunctions in Your 2018 Mitsubishi Eclipse Cross and How to Fix Them

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Reviewed by
Bo Fader
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 Eclipse Cross 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 short circuit in the wiring can disrupt the electrical signals needed for proper operation of 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 Eclipse Cross?

To effectively diagnose an AC issue in a 2018 Mitsubishi Eclipse Cross, start with a systematic approach that prioritizes simpler checks before delving into more complex diagnostics. Begin by utilizing an OBD2 scanner to retrieve any fault codes that may indicate specific problems within the air conditioning system. This initial step can save time and help pinpoint the issue. Next, inspect for refrigerant leaks, as these are common culprits that can significantly impact cooling performance. Following this, examine the climate control electrical system to ensure all components are operational. Pay particular attention to the AC compressor, as a malfunctioning compressor can lead to inadequate cooling. Additionally, check the AC relay for faults, which can disrupt the system's functionality. If necessary, consider recharging the refrigerant using a DIY kit, but only after confirming that there are no leaks. Don’t forget to inspect the cabin filter and vents for blockages that could hinder airflow, and clean the air conditioning condenser to remove any debris that may obstruct heat release. By following this structured diagnostic approach, you can efficiently identify and resolve AC issues in your Mitsubishi Eclipse Cross.

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

When faced with a non-functioning AC in your 2018 Mitsubishi Eclipse Cross, addressing the issue promptly is crucial for several reasons. First and foremost, the comfort of you and your passengers can be significantly compromised, especially during hot weather or long drives, making the driving experience less enjoyable. Additionally, postponing repairs can lead to more severe damage within the AC system, resulting in higher repair costs in the future. It's also important to consider the health implications; a malfunctioning AC can negatively affect air quality and circulation, potentially leading to discomfort or health issues for those inside the vehicle. Lastly, if you plan to sell your car, a fully operational AC system is a key feature that can enhance its resale value. Therefore, it is advisable to prioritize the repair of your AC system to ensure a comfortable, safe, and valuable driving experience. If you're uncertain about the urgency of the repair, consulting with a qualified mechanic or AC specialist can provide clarity and guidance.

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2018 Mitsubishi Eclipse Cross AC Issues & Repair Guide