2020 Subaru Ascent AC Isn't Working

Common Causes of AC Malfunctions in Your 2020 Subaru Ascent 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 2020 Subaru Ascent 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 2020 Subaru Ascent?

When diagnosing an AC issue in a 2020 Subaru Ascent, start by checking the air filters, as dirty or clogged filters can significantly restrict airflow and diminish the system's performance. Next, inspect the refrigerant levels; low levels may indicate a leak, which can lead to inadequate cooling. Following this, examine the AC compressor, as a malfunctioning compressor can result in little to no cooling. Additionally, testing the thermostat is crucial, as a faulty thermostat can disrupt the AC's functionality. Finally, look for any visible leaks in the AC system, such as oily residue or refrigerant stains, which can provide further clues to the problem. By systematically addressing these areas, you can effectively diagnose and potentially resolve AC issues in your Subaru Ascent.

What are the common problems that could cause the AC to stop working in a 2020 Subaru Ascent?

When troubleshooting the air conditioning system in a 2020 Subaru Ascent, it's essential to recognize the common problems that may lead to a malfunction. One of the first things to check is the refrigerant levels; low refrigerant can significantly hinder the system's ability to cool the air effectively. If the refrigerant is adequate, the next step is to inspect the compressor, as a faulty compressor can prevent the AC from functioning altogether. Additionally, electrical issues such as blown fuses or damaged wiring can disrupt the system's operation, so examining these components is crucial. Another potential issue is a clogged or leaking condenser, which can impede airflow and cooling efficiency. Lastly, ensure that the cooling fans are operational, as broken fans can prevent heat dissipation, further compromising the AC's performance. By systematically addressing these common problems, DIYers can effectively diagnose and potentially resolve AC issues in their Subaru Ascent.

How urgent is it to repair the non-functioning AC in a 2020 Subaru Ascent?

When faced with a non-functioning AC in your 2020 Subaru Ascent, addressing the issue promptly is crucial for several reasons. First and foremost, a working AC system is vital for maintaining a comfortable driving environment, especially during sweltering summer months or on long road trips. Beyond comfort, the safety implications cannot be overlooked; a malfunctioning AC can hinder defrosting capabilities, which may impair visibility and increase the risk of accidents. Additionally, neglecting AC repairs can adversely affect your vehicle's resale value, as prospective buyers often prioritize a well-functioning climate control system. Lastly, delaying repairs can lead to more severe damage within the AC system, resulting in higher repair costs down the line. Therefore, it is essential to prioritize the repair of your AC system to ensure your comfort, safety, and the longevity of your vehicle.

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