2017 Subaru WRX AC Isn't Working

Common Causes of AC Malfunctions in Your 2017 Subaru WRX and How to Fix Them

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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 Subaru WRX 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 for a non-functioning AC in a 2017 Subaru WRX?

When faced with a non-functioning AC in your 2017 Subaru WRX, it's essential to adopt a systematic diagnostic approach to identify and resolve the issue efficiently. Start by checking the thermostat settings to ensure it is correctly set to a cool temperature and that the AC is activated; often, a simple adjustment can rectify the problem. Next, inspect the air filters for dirt or clogs, as these can significantly hinder airflow and reduce AC performance. If airflow seems restricted, replacing the air filters may be necessary. Following this, examine the refrigerant levels using a pressure gauge; low levels can lead to warm air blowing from the vents, so consider adding refrigerant if needed. Additionally, look for any signs of leaks in the AC system, such as oily residue around hoses or connections, as these can indicate a loss of refrigerant. It's also crucial to check the AC compressor to ensure it engages properly when the system is turned on, as a malfunctioning compressor can prevent effective cooling. Lastly, inspect the electrical components, including fuses and relays, to rule out any faulty connections that could be disrupting the AC's functionality. By methodically following these steps, you can effectively diagnose and address common issues with your Subaru WRX's AC system.

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

When diagnosing air conditioning issues in a 2017 Subaru WRX, it's important to recognize the common problems that may be at play. One prevalent issue is low refrigerant levels, which can severely limit the system's cooling capabilities. This often points to a leak that needs to be located and repaired. Another frequent cause of AC failure is a faulty compressor; if the compressor isn't working properly, it won't circulate refrigerant effectively, leading to insufficient cooling. Electrical problems, such as blown fuses or damaged wiring, can also disrupt the AC's functionality, making it essential to inspect these components. Additionally, a clogged or leaking condenser can hinder the system's ability to dissipate heat, while malfunctioning cooling fans can restrict airflow, further diminishing cooling efficiency. By understanding these common issues, DIYers can more effectively troubleshoot their AC problems and decide if professional assistance is necessary for repairs.

How urgent is it to address the AC failure in my 2017 Subaru WRX?

Addressing the AC failure in your 2017 Subaru WRX is crucial for several reasons that extend beyond mere comfort. First and foremost, a functioning air conditioning system is essential for maintaining a pleasant driving environment, particularly during hot weather or long trips. Without it, you may find yourself uncomfortable, which can detract from your overall driving experience. More importantly, the safety implications of a malfunctioning AC system cannot be overlooked. Extreme heat can lead to driver fatigue and distraction, potentially compromising your focus and reaction times on the road. Additionally, neglecting AC issues can result in more severe problems that may require costly repairs down the line, making early intervention a wise choice. Lastly, keeping your vehicle well-maintained, including the AC system, can enhance its resale value, as prospective buyers often look for vehicles that are in good working condition. Therefore, while it may not seem like an immediate emergency, addressing AC failure promptly is essential for your comfort, safety, and the long-term health of your Subaru WRX.

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