Some Mazda MX-5 Miata owners report experiencing issues with their AC blowing hot air even after a recent recharge. One common cause is a refrigerant leak, which can prevent the system from cooling effectively, necessitating a thorough check and repair before recharging again. Additionally, some owners find that a faulty compressor may lead to similar problems, requiring repair or replacement to restore functionality. Another potential issue is a clogged expansion valve, which can restrict refrigerant flow and impair cooling performance, often resolved by cleaning or replacing the valve. Electrical issues, such as a malfunctioning AC control module or faulty wiring, can also impact the system's performance, highlighting the need for a comprehensive inspection of all electrical components. Lastly, problems with the blend door mechanism, which regulates the mix of hot and cold air, can cause hot air to be emitted from the vents. It is advisable for owners facing these issues to consult a professional mechanic for accurate diagnosis and necessary repairs to ensure proper cooling operation.
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