2020 Mazda 6 AC Isn't Working

Common Causes of AC Malfunctions in Your 2020 Mazda 6 and How to Fix Them

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Reviewed by
Andrew Hajjar
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 2020 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 steps to diagnose the AC issue in a 2020 Mazda 6?

To effectively diagnose an AC issue in your 2020 Mazda 6, start with the simplest tasks that can often resolve common problems. Begin by checking the air filters, as clogged cabin and engine air filters can significantly hinder AC performance. Next, inspect the refrigerant levels using a gauge; low levels may indicate a leak or other underlying issues. If the refrigerant is adequate, examine the AC compressor for any signs of damage or wear, as a malfunctioning compressor can lead to inadequate cooling. Following this, inspect the AC condenser for blockages or damage that could obstruct airflow. It’s also crucial to check for any visible leaks in the system, which may appear as oily residue around connections or hoses. Ensure that all electrical components related to the AC system are secure and functioning properly, as electrical issues can disrupt performance. Finally, if the problem persists, consider running diagnostic tests with appropriate tools to identify any error codes or specific system malfunctions. By following this structured approach, you can systematically identify and address AC issues in your Mazda 6, ensuring a comfortable driving experience.

What are the common problems that could cause the AC to stop working in a 2020 Mazda 6?

When troubleshooting the air conditioning system in a 2020 Mazda 6, it's essential to recognize the common problems that could lead to a malfunction. One of the primary issues is low refrigerant levels, which can significantly hinder the system's ability to cool the air effectively. If the refrigerant is low, it may indicate a leak or that the system has not been properly charged. Another potential culprit is a faulty compressor; if the compressor is not functioning correctly, it will fail to circulate the refrigerant, resulting in inadequate cooling. Additionally, electrical issues such as blown fuses or damaged wiring can disrupt the AC's operation, preventing it from turning on or functioning properly. Clogged or leaking refrigerant lines can also pose a problem, as blockages can restrict the flow of refrigerant, while leaks can lead to a loss of pressure. Furthermore, issues with the condenser or evaporator can impede the cooling process, and a malfunctioning blower motor may result in insufficient airflow from the vents. Identifying these common problems can help you diagnose the issue more effectively, but for a thorough inspection and repair, consulting a qualified technician is recommended.

How urgent is it to address the non-functioning AC in a 2020 Mazda 6?

When your 2020 Mazda 6's air conditioning system fails, the urgency to address the problem cannot be overstated. Driving without a functioning AC in hot weather can lead to severe discomfort and health risks, particularly for those sensitive to heat. Moreover, a malfunctioning AC may indicate underlying issues within the vehicle's cooling system, which, if left unchecked, could escalate into more significant problems such as engine overheating. This not only compromises your driving experience but also poses safety risks on the road. Timely repairs not only enhance comfort but can also prevent further damage to the AC system, ultimately saving you money on extensive repairs down the line. For DIY enthusiasts, understanding the urgency of this issue is crucial, as it allows you to prioritize repairs and maintain the overall health of your vehicle.

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