2017 Audi S5 AC Isn't Working

Common Causes of AC Malfunctions in Your 2017 Audi S5 and How to Resolve 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 Audi S5 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 Audi S5?

When diagnosing an AC issue in a 2017 Audi S5, it's crucial to start with a systematic approach to ensure you cover all potential problems. Begin by checking the air filters, as clean filters are vital for proper airflow; if they are clogged, replacing them can significantly improve AC performance. Next, inspect the refrigerant levels, as insufficient refrigerant can lead to inadequate cooling. If the levels are low, you may need to recharge the system. Following this, examine the AC compressor for any visible signs of damage or wear, as a malfunctioning compressor can severely impact the system's ability to cool. Additionally, testing the thermostat is essential; a faulty thermostat may not regulate temperature effectively, leading to inconsistent cooling. Lastly, check for any leaks in the AC system, as leaks can cause refrigerant loss and diminish cooling efficiency. By methodically addressing these areas, you can effectively diagnose and potentially resolve AC issues in your Audi S5, making it a rewarding DIY project.

What are the common problems that could cause the AC to stop working in a 2017 Audi S5?

When the air conditioning system in a 2017 Audi S5 ceases to function, several common problems may be at play, and understanding these can empower DIY enthusiasts to troubleshoot effectively. One of the primary culprits is low refrigerant levels, which can significantly hinder the system's cooling capabilities. If the refrigerant is insufficient, it may indicate a leak or that the system has not been properly charged. Another frequent issue is a faulty compressor; this component is essential for circulating refrigerant throughout the system, and if it fails, the AC will not cool the air. Additionally, electrical problems, such as blown fuses or damaged wiring, can disrupt the AC's operation, making it crucial to inspect these components. A clogged or leaking condenser can also impede the system's performance, as it plays a vital role in dissipating heat. Lastly, a malfunctioning thermostat may fail to regulate the temperature correctly, leading to inconsistent cooling. By identifying these common issues, DIYers can take the first steps toward diagnosing and potentially resolving AC problems in their Audi S5.

How urgent is it to address the AC failure in my 2017 Audi S5?

When faced with an AC failure in your 2017 Audi S5, it is crucial to recognize the urgency of the situation. A malfunctioning AC system not only detracts from your driving comfort, especially during sweltering summer months, but it can also pose significant safety risks. For instance, inadequate cooling can lead to fogged windows, impairing visibility and increasing the likelihood of accidents. Moreover, delaying repairs can exacerbate the problem, potentially leading to more extensive and costly damage to the AC system. This not only affects your immediate driving experience but can also diminish the resale value of your vehicle. By addressing AC issues promptly, you ensure a comfortable and safe driving environment while protecting your investment in the long run.

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