2017 Mitsubishi Lancer AC Isn't Working

Common Causes of AC Malfunctions in Your 2017 Mitsubishi Lancer and How to Fix Them

Find Repair Location
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 2017 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 2017 Mitsubishi Lancer?

When diagnosing the air conditioning issue in your 2017 Mitsubishi Lancer, start with the simplest checks to avoid unnecessary complications. Begin by ensuring that the air vents are operational; if no air is blowing, this could indicate a malfunctioning blower motor or a blockage in the air ducts. Next, inspect the AC controls to confirm that they are set correctly, as incorrect settings can often lead to perceived AC failures. Pay attention to any unusual noises when the AC is activated, as these sounds may signal problems with the compressor or other components. Additionally, check for any signs of refrigerant leaks under the vehicle, as these can significantly impact cooling efficiency. Finally, assess the cooling performance by feeling the air from the vents; if it’s not as cold as expected, this could point to low refrigerant levels or compressor issues. By following these steps, you can effectively narrow down the potential causes of your AC problem and determine the best course of action for repair.

What are the common problems that could cause the AC to stop working in a 2017 Mitsubishi Lancer?

When the air conditioning system in your 2017 Mitsubishi Lancer stops functioning, 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 properly. Another common issue is a faulty compressor; if the compressor fails, it won't circulate the refrigerant, leading to a complete loss of cooling. Additionally, electrical problems such as blown fuses or damaged wiring can disrupt the AC's operation, making it essential to check these components. A clogged or leaking condenser can also hinder the system's ability to cool the air, as it plays a crucial role in dissipating heat. Lastly, a malfunctioning blower motor can result in inadequate airflow, further diminishing the cooling performance. By understanding these common problems, you can take the first steps toward diagnosing and potentially fixing the AC issues in your Mitsubishi Lancer.

How urgent is it to address the non-functioning AC in my 2017 Mitsubishi Lancer?

When your 2017 Mitsubishi Lancer's air conditioning system fails, the urgency to address the issue becomes clear when considering the potential consequences of neglect. A malfunctioning AC can significantly diminish your driving comfort, especially during sweltering summer months or on long journeys, leading to an unpleasant experience. Moreover, the safety implications cannot be overlooked; driving in extreme heat without a functioning AC can increase the risk of overheating, which may impair your concentration and reaction times on the road. Additionally, a well-maintained AC system plays a crucial role in ensuring good air quality within the vehicle by managing humidity and filtering out harmful pollutants, thus safeguarding your health. Lastly, from a financial perspective, timely repairs can help maintain your vehicle's resale value, as a fully functional AC system is a key factor for potential buyers. Therefore, while it may not seem like an immediate emergency, prioritizing the repair of your non-functioning AC is essential for your comfort, safety, health, and the overall longevity of your Mitsubishi Lancer.

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.