2012 Mitsubishi Eclipse AC Isn't Working

Common Causes of AC Failure in Your 2012 Mitsubishi Eclipse 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 Eclipse 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 2012 Mitsubishi Eclipse?

When your 2012 Mitsubishi Eclipse's AC isn't functioning properly, start by checking the thermostat settings to ensure they are correctly adjusted. Sometimes, the simplest solution is just a matter of misconfiguration. Next, inspect the air filters; dirty or clogged filters can significantly hinder airflow, so replacing them can often restore performance. If the issue persists, examine the refrigerant levels using a pressure gauge, as low levels can lead to warm air blowing from the vents. Additionally, look for any signs of leaks in the AC system, such as oily residue, which can indicate refrigerant loss. It's also important to check the AC compressor for unusual noises or failure to engage, as this component is vital for cooling. Lastly, ensure that all electrical connections related to the AC system are secure and functioning properly, as faulty wiring can prevent the system from operating. If these steps do not resolve the issue, seeking assistance from a professional mechanic or HVAC technician is recommended for a thorough diagnosis and repair. By following these initial diagnostic steps, you can effectively troubleshoot common AC issues in your Mitsubishi Eclipse.

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

When the AC system in your 2012 Mitsubishi Eclipse ceases to function, it can be frustrating, but understanding the common problems can empower you to troubleshoot effectively. One of the primary culprits is low refrigerant levels, which can significantly hinder the cooling process. If you suspect this, checking for leaks and recharging the system may be necessary. Another frequent issue is a faulty compressor; if you hear unusual noises or notice a lack of cooling, this component might need replacement. Additionally, electrical problems such as blown fuses or damaged wiring can disrupt the AC's operation, so inspecting these elements is crucial. Clogged or leaking condensers can also impede performance, so ensure that the condenser is clear of debris and free from leaks. Lastly, a malfunctioning blower motor can lead to poor airflow, making it essential to verify that the motor is operational. By systematically addressing these potential issues, you can restore your AC system's functionality and enjoy a comfortable driving experience.

How urgent is it to address the non-functioning AC in a 2012 Mitsubishi Eclipse?

When faced with a non-functioning AC in your 2012 Mitsubishi Eclipse, it is crucial to recognize the urgency of the situation. Driving without a working air conditioning system can lead to significant discomfort, especially during the sweltering summer months, where high temperatures can pose health risks such as heat exhaustion. Moreover, a malfunctioning AC can detract from your overall driving experience, making it difficult to concentrate on the road due to discomfort. Additionally, this issue may indicate deeper problems within the vehicle's cooling system, which, if left unaddressed, could escalate into more severe damage and costly repairs. Timely intervention not only enhances your comfort and safety but also helps maintain the resale value of your vehicle, as a fully functional AC is a desirable feature for potential buyers. Therefore, prioritizing the repair of your AC system is essential for both your immediate well-being and the long-term health of your vehicle.

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