2012 Mitsubishi Lancer AC Isn't Working

Common Causes of AC Failure in Your 2012 Mitsubishi Lancer and How to Fix 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 2012 Mitsubishi Lancer 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 steps to diagnose the AC issue in a 2012 Mitsubishi Lancer?

To effectively diagnose the AC issue in your 2012 Mitsubishi Lancer, start by checking the air filters, as dirty or clogged filters can significantly hinder airflow and cooling efficiency. Next, inspect the refrigerant levels; low levels may suggest a leak, which is critical to address for optimal performance. It's also important to examine the compressor for any signs of damage or wear, as this component is vital for the AC system's operation. Additionally, testing the thermostat is crucial, as a malfunctioning thermostat can disrupt the cooling process. Be sure to look for any visible leaks in the AC system, as these can severely impact its efficiency. Finally, check the electrical components for any faulty connections, as these can also lead to AC problems. By following these steps, you can systematically identify and address the issues affecting your vehicle's air conditioning system, ensuring a more comfortable driving experience.

What are the common problems that could cause the AC to stop working in a 2012 Mitsubishi Lancer?

When the air conditioning system in a 2012 Mitsubishi Lancer ceases to function, it can be frustrating, especially during hot weather. One of the most frequent culprits is low refrigerant levels, which can occur due to leaks or insufficient charging, preventing the system from cooling effectively. Another common issue is a faulty compressor; if the compressor is not engaging properly, it can lead to a complete lack of cooling. Electrical problems, such as blown fuses or damaged wiring, can also disrupt the AC's operation, making it essential to check these components. Additionally, a clogged or leaking condenser can hinder the system's ability to dissipate heat, while a malfunctioning blower motor may result in weak airflow from the vents. By understanding these potential problems, DIYers can take the first steps toward diagnosing and addressing AC issues in their Mitsubishi Lancer, ensuring a comfortable driving experience.

How urgent is it to repair the non-functioning AC in a 2012 Mitsubishi Lancer?

When faced with a non-functioning AC in your 2012 Mitsubishi Lancer, the urgency to address the issue cannot be overstated. A malfunctioning AC system not only compromises your comfort during hot weather but can also lead to poor air quality, which poses health risks for you and your passengers. Moreover, neglecting this repair can adversely affect your vehicle's resale value, as prospective buyers often look for well-maintained systems. Additionally, continuing to operate a vehicle with a faulty AC can place undue strain on other mechanical components, potentially resulting in more severe and costly repairs down the line. Therefore, it is crucial to prioritize the repair of your AC system to ensure a safe, comfortable, and efficient driving experience.

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