2017 Mazda 6 AC Isn't Working

Common Causes of AC Malfunctions in Your 2017 Mazda 6 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 Mazda 6 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 when the AC isn't working in a 2017 Mazda 6?

When your 2017 Mazda 6's AC isn't functioning, start by checking the thermostat settings to confirm that it is set to a cool temperature and that the AC is activated. This simple step can often resolve the issue if the settings were inadvertently changed. Next, inspect the air vents to ensure that air is flowing; a lack of airflow may indicate a problem with the blower motor or potential blockages in the air ducts. While the AC is running, listen for any unusual noises, as these could signal issues with the compressor or other components. It's also crucial to check the refrigerant levels, as low levels can severely impact cooling efficiency; if necessary, consult a professional to have these levels assessed. Additionally, look for any visible signs of leaks around the AC system, such as oily residue, which can indicate refrigerant loss. Finally, testing the compressor is essential, as it plays a critical role in the AC's operation; if it’s not functioning properly, it may need repair or replacement. By following these diagnostic steps, you can effectively identify and address common AC issues in your Mazda 6.

What are the common problems that could cause the AC to stop working in a 2017 Mazda 6?

When the air conditioning system in your 2017 Mazda 6 stops functioning, 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, preventing the system from cooling effectively. Another common issue is a faulty compressor; if the compressor is not engaging or is damaged, it will fail to circulate refrigerant, resulting in warm air blowing from the vents. Additionally, electrical problems such as blown fuses or damaged wiring can disrupt the AC's operation, leading to complete system failure. Clogged or leaking condensers can also hinder the cooling process, as they are essential for dissipating heat from the refrigerant. Lastly, malfunctioning cooling fans can restrict airflow, further diminishing the system's ability to cool the air. By understanding these common problems, you can better diagnose the issue and determine whether a DIY fix is feasible or if professional assistance is needed.

How urgent is it to repair the non-functioning AC in a 2017 Mazda 6?

When faced with a non-functioning AC in your 2017 Mazda 6, the urgency of repair cannot be overstated. The discomfort of sweltering heat during summer drives can quickly turn a pleasant journey into an unbearable experience, making it essential to prioritize the repair for your comfort. Moreover, safety is a critical concern; a malfunctioning AC can lead to foggy windows, significantly impairing visibility and increasing the risk of accidents. Additionally, neglecting the AC system can adversely affect your vehicle's resale value, as potential buyers may be deterred by the prospect of costly repairs. Lastly, ignoring AC issues can lead to more severe mechanical problems down the line, resulting in even higher repair costs. Therefore, addressing the AC malfunction promptly is not just about comfort; it’s a crucial step in ensuring your safety, maintaining your vehicle's value, and preventing further damage.

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