2017 Audi A5 Quattro AC Isn't Working

Common Causes of AC Malfunctions in Your 2017 Audi A5 Quattro 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 Audi A5 Quattro 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 A5 Quattro?

To effectively diagnose the AC issue in your 2017 Audi A5 Quattro, start by checking the air filters, as clean filters are crucial for optimal airflow and cooling performance. Next, inspect the refrigerant levels; low refrigerant can significantly hinder the system's ability to cool. If the refrigerant levels are adequate, examine the AC compressor for any signs of damage or wear, as a malfunctioning compressor can lead to insufficient cooling. Additionally, test the thermostat to ensure it is operating correctly, since a faulty thermostat can disrupt the entire AC system's functionality. Finally, look for any leaks in the AC system, as these can cause refrigerant loss and diminish cooling efficiency. By following these steps, you can systematically identify the root cause of the AC issues and take appropriate action to restore comfort in your vehicle.

What are the common problems that could cause the AC to stop working in a 2017 Audi A5 Quattro?

When the air conditioning system in your 2017 Audi A5 Quattro ceases to function, it can be frustrating, especially during hot weather. One of the most frequent culprits is low refrigerant levels, which can occur due to leaks or insufficient charging, leading to inadequate cooling. Another common issue is a faulty compressor; if the compressor is not engaging properly, the system will fail to circulate refrigerant, resulting in warm air blowing from the vents. Electrical problems, such as blown fuses or damaged wiring, can also disrupt the AC's operation, making it essential to check these components. Additionally, clogged or leaking refrigerant lines can impede the flow of refrigerant, while a defective condenser may prevent effective heat exchange, both of which can severely impact cooling performance. Lastly, if you notice poor airflow, the blower motor might be malfunctioning, which can further exacerbate the issue. While some of these problems can be diagnosed and addressed through DIY methods, it is often advisable to consult a qualified technician for a thorough inspection and repair to ensure your AC system is restored to optimal working condition.

How urgent is it to address the non-functioning AC in a 2017 Audi A5 Quattro?

Addressing a non-functioning AC in your 2017 Audi A5 Quattro is crucial for several reasons. First and foremost, driving without air conditioning in hot weather can lead to significant discomfort and even health risks, particularly for those sensitive to heat. Moreover, a malfunctioning AC can detract from your overall driving experience, making long trips or congested traffic particularly unpleasant. It's also important to recognize that an AC issue may indicate a more serious problem within the vehicle's cooling system, which, if left unresolved, could result in further damage and costly repairs down the line. By delaying the necessary repairs, you risk escalating minor issues into major ones, ultimately leading to higher expenses. Therefore, it is essential to prioritize fixing your AC system not only for your comfort and safety but also to maintain the integrity of your vehicle.

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