2019 Mazda CX-5 AC Isn't Working

Common Causes of AC Malfunctions in Your 2019 Mazda CX-5 and How to Fix Them

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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 2019 Mazda CX-5 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 steps should I take to diagnose the AC issue in my 2019 Mazda CX-5?

When diagnosing the AC issue in your 2019 Mazda CX-5, it's essential to adopt a systematic approach that begins with the simplest checks before progressing to more complex diagnostics. Start by inspecting the air filters, as dirty or clogged filters can significantly hinder airflow and reduce AC efficiency. Next, assess the refrigerant levels; low levels may suggest a leak in the system, which is critical to address. Following this, examine the compressor for any unusual noises or signs of leakage, as it plays a vital role in the AC's operation. Additionally, test the thermostat to ensure it is functioning correctly, as a malfunctioning thermostat can lead to inconsistent cooling. Be vigilant for any visible leaks, such as oily residues or refrigerant stains, which can indicate underlying issues. It's also important to check the electrical components, as faulty connections can disrupt the AC's performance. If these steps do not resolve the issue, or if you encounter complexities beyond your expertise, consulting a professional mechanic or AC specialist is advisable to ensure a thorough diagnosis and repair. By following this structured diagnostic approach, you can effectively identify and address the AC problems in your vehicle.

What are the common problems that could cause the AC to stop working in a 2019 Mazda CX-5?

When the air conditioning system in your 2019 Mazda CX-5 fails to deliver cool air, it can be frustrating, but understanding the common problems can help you troubleshoot effectively. One of the primary culprits is low refrigerant levels, which can occur due to leaks or insufficient charging, preventing the system from cooling properly. Another frequent issue is a faulty compressor; if the compressor is not functioning, it won't circulate the refrigerant, leading to a lack of cold air. Additionally, electrical problems such as blown fuses or faulty wiring can disrupt the AC's operation, making it essential to check these components. Clogged or leaking refrigerant lines can also impede the flow of refrigerant, significantly affecting performance. Lastly, a damaged condenser can hinder heat dissipation, resulting in poor cooling efficiency. While some of these issues can be diagnosed and potentially fixed at home, it is advisable to consult a qualified technician for a thorough inspection and repair to ensure your AC system operates optimally.

How urgent is it to repair the non-functioning AC in a 2019 Mazda CX-5?

When faced with a non-functioning AC in your 2019 Mazda CX-5, the urgency of repair cannot be overstated. A reliable air conditioning system is crucial for maintaining comfort during hot weather, especially on long drives where temperatures can soar. Beyond comfort, a malfunctioning AC can compromise air quality, potentially exacerbating health issues for those with respiratory conditions. Additionally, neglecting AC repairs can diminish your vehicle's resale value, as prospective buyers often look for well-maintained features. Most importantly, delaying repairs can lead to more significant damage within the AC system, resulting in costly repairs that could have been avoided. Therefore, addressing AC issues promptly is essential not only for immediate comfort and health but also for the long-term well-being of your vehicle.

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