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What are the possible reasons for my car AC blowing hot air?

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If your car’s AC is blowing hot air, several culprits could be at play. First, low refrigerant levels are a common issue. The AC system relies on refrigerant to absorb and release heat; if it’s leaking—say, from worn seals or a punctured line—it can’t cool properly. Check for oily spots under the car as a clue.

Second, a faulty compressor might be to blame. This pump circulates the refrigerant, and if it’s seized or its clutch isn’t engaging (listen for a click when you turn on the AC), you’ll get warm air. Electrical issues, like a blown fuse or bad relay, could also stop the compressor.

Third, a clogged condenser or dirty cabin air filter can obstruct airflow. The condenser, upfront near the radiator, cools the refrigerant, but debris like leaves or bugs can block it. A choked filter inside reduces air volume, making it feel stuffy and warm.

Finally, a broken blend door actuator—a small motor controlling air (954-566-3625) direction—might be stuck on the heater side. If you hear clicking under the dash, that’s a hint. Diagnosing it might need a pro, but checking filters or refrigerant levels is a solid start. Heat’s no fun—get it fixed!
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