Mazda MX-5 Miata AC blowing hot air despite recent recharge on Mazda MX-5 Miata

Submitted by Vehicle Owner · Jun 23, 2025
Published by RepairPal

Problem overview

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.

1 person reported this problem
0 comments
Schedule Repair

Mazda MX-5 Miata vehicles with this problem

0 model year affected

Search for another problem

RepairPal Car Genius

Ask our experts about your Mazda.

RepairPal Car Genius™ is a free resource for vehicle owners seeking advice on maintenance, auto repair, shop inquiries, estimates, and finding a trustworthy repair shop in your area.

 Auto Repair Expert Auto Repair Expert

Call us at 877-913-1554

Available 9am – 6pm ET Monday through Friday

Call Our Experts