2021 Subaru Impreza AC Isn't Working

Common Causes of AC Issues in Your 2021 Subaru Impreza and How to Fix Them

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Reviewed by
Andrew Hajjar
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 2021 Subaru Impreza 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 2021 Subaru Impreza?

To effectively diagnose an AC issue in your 2021 Subaru Impreza, start by checking the air filters, as dirty or clogged filters can significantly hinder airflow and cooling performance. Next, inspect the refrigerant levels; low levels may indicate a leak or other underlying problems that need attention. It's also crucial to examine the AC compressor to ensure it is functioning correctly, as a faulty compressor can lead to inadequate cooling. Additionally, verify the thermostat's operation, since a malfunctioning thermostat can disrupt the system's temperature regulation. Finally, look for any visible signs of leaks in the AC system, as these can lead to refrigerant loss and diminished cooling efficiency. By following these steps, you can systematically assess and address potential AC issues, making it easier to restore comfort to your vehicle.

What are the common problems that could cause the AC to stop working in a 2021 Subaru Impreza?

When the air conditioning system in your 2021 Subaru Impreza fails to cool, it can be frustrating, but understanding the common problems can help you diagnose the issue. One of the primary culprits is low refrigerant levels, which can occur due to leaks or insufficient charging, leading to poor cooling performance. Another frequent issue is a faulty compressor; if the compressor is not functioning correctly, it can prevent the refrigerant from circulating properly, resulting in a lack of cool air. Additionally, electrical problems such as blown fuses or damaged wiring can disrupt the AC's operation, making it essential to check these components. Clogged or leaking condensers can also hinder the system's ability to cool effectively, as they play a crucial role in dissipating heat. Lastly, ensure that the cooling fans are operational, as malfunctioning fans can lead to inadequate airflow and cooling. By systematically checking these areas, you can effectively troubleshoot and potentially resolve the AC issues in your Subaru Impreza.

How urgent is the repair needed for the non-functioning AC in a 2021 Subaru Impreza?

When faced with a non-functioning AC in your 2021 Subaru Impreza, assessing the urgency of the repair is crucial for both comfort and vehicle longevity. The season plays a significant role; during sweltering summer months, a malfunctioning AC can lead to uncomfortable and potentially unsafe driving conditions, especially on long commutes. Additionally, extreme temperatures can exacerbate the discomfort for both the driver and passengers, making it imperative to address the issue promptly. While the AC system may not directly affect the vehicle's overall performance, neglecting the problem can lead to further complications, such as refrigerant leaks or compressor failure, which could result in more extensive and costly repairs. Therefore, it is advisable to prioritize the repair of your AC system to maintain a comfortable driving experience and prevent any long-term damage to the vehicle. Taking action sooner rather than later can save you from more significant issues down the road.

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