2016 Subaru WRX AC Isn't Working

Common Causes of AC Failure in Your 2016 Subaru WRX and How to Restore Cool Comfort

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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 2016 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 short circuit in the wiring can disrupt the electrical signals needed for proper operation of 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 2016 Subaru WRX?

To effectively diagnose the air conditioning issue in your 2016 Subaru WRX, start by checking the condenser for any debris that may be obstructing airflow, as this is a frequent culprit for inadequate cooling. Next, inspect the cabin air filter; a clogged filter can significantly reduce airflow and cooling efficiency, so replacing it can often resolve the problem. Additionally, verify the movement of the blend door, as any malfunction here can disrupt temperature control within the HVAC system. Finally, assess the system pressure to ensure it falls within the recommended range, as abnormal pressure levels can indicate underlying issues. By systematically addressing these areas, you can efficiently narrow down the cause of your AC troubles and take the necessary steps to restore optimal performance.

What are the common problems that could cause the AC to stop working in a 2016 Subaru WRX?

When it comes to diagnosing AC issues in a 2016 Subaru WRX, several common problems may be at play. One of the first things to check is the refrigerant level; both low and overcharged refrigerant can disrupt the system's performance. If the refrigerant is adequate, the next step is to inspect the compressor, as a malfunction here can prevent the AC from functioning altogether. Additionally, a clogged cabin air filter can restrict airflow, leading to inadequate cooling. It's also essential to examine the condenser and evaporator coils for dirt buildup, which can hinder heat exchange. A sluggish blower motor may further exacerbate airflow issues, while a blown fuse or faulty relay can interrupt electrical signals necessary for operation. Lastly, be vigilant for signs of system leaks, as refrigerant leaks can lead to a complete loss of cooling. By understanding these potential failure modes, DIYers can systematically troubleshoot their AC system and take appropriate action to restore comfort in their vehicle.

How urgent is it to address the AC failure in my 2016 Subaru WRX?

When it comes to addressing AC failure in your 2016 Subaru WRX, understanding the urgency of the situation is crucial. If your air conditioning system is experiencing issues such as refrigerant leaks or compressor failures, it is vital to act quickly. These problems can lead to inadequate cooling, which not only affects your comfort but can also strain other components of the AC system, potentially resulting in costly repairs. Additionally, electrical issues like a blown fuse or a malfunctioning control module require immediate attention, as they can completely disable your AC system, leaving you without relief during hot weather. Even seemingly minor issues, such as a dirty cabin air filter or a clogged condenser, should not be ignored, as they can diminish the overall efficiency of your vehicle's air conditioning. By diagnosing and addressing these problems promptly, you can prevent further damage and ensure that your Subaru WRX remains comfortable and functional, safeguarding both your driving experience and the longevity of your vehicle.

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