What to Do When the Car Air Conditioner Keeps Turning Off Automatically?
2 Answers
When pressing the accelerator, the compressor's power increases, causing the system pressure to rise too high. The pressure switch then disconnects, triggering high-pressure protection, and the air conditioner automatically turns off. When at an intersection, the engine speed decreases, causing the system pressure to drop back within the normal range, and the air conditioner resumes operation. Check if the refrigerant is overfilled.
A few days ago, my car's AC kept turning off automatically, which was really annoying. I think the most common reason is a faulty temperature sensor, where the system misjudges that the cabin temperature has reached the set level and shuts down automatically. Additionally, issues with the compressor control module or poor wiring connections can also trigger the protection mechanism. I first checked the fuse box, and there were no signs of blown fuses. Then, I checked if the fan was running properly, as poor cooling can cause the AC to overheat and shut down. Evaporator icing is another common issue, leading to airflow blockage and automatic system shutdown. For simple DIY fixes, you can clean the air filter to avoid blockages that affect cooling performance. Remember, never tamper with the refrigerant yourself—this requires professional tools, or you risk damaging the system. During regular maintenance, I have the technician check the electrical circuits to fix everything in one go and avoid compromising safe driving. Ensuring clear visibility while driving is crucial, especially during rainy or foggy conditions when AC failure can be dangerous. So, if you encounter such issues, it's best to address them promptly and not delay.
