What Are the Reasons Why a Car Air Conditioner Won't Turn On?
3 Answers
Reasons why a car air conditioner won't turn on: 1. The car air conditioner compressor is malfunctioning. Since the car air conditioner compressor compresses air for cooling before releasing it into the car, this situation requires a detailed inspection of the car air conditioner compressor at a repair shop or 4S store. 2. The car's electronic system is malfunctioning, and the air conditioner starter cannot sense the startup command, preventing the air conditioner from functioning normally. In this case, the entire car's electrical circuit needs to be checked. 3. The air conditioner button is damaged or the connection between the button and the internal switch of the air conditioner is poor, which can also prevent the air conditioner from starting. This situation requires reinstalling the car air conditioner button to ensure proper wiring. 4. The car battery is dead, causing the entire car's electrical system to fail, and the air conditioner cannot start. In this case, the car battery needs to be recharged.
When I turned on the air conditioning, I found it suddenly wouldn't start. Common reasons include insufficient system pressure due to refrigerant leakage, compressor failure or jamming, blown fuses, or damaged switches—all of which are electrical system issues. Driving without cold air on a hot day is truly miserable, and the risk of fatigue driving increases sharply, so don't ignore it. It's recommended to first check yourself: inspect the fuse box to see if the relevant fuse is blown, turn the switch and listen for any sound from the compressor—if it's silent, it might be a circuit problem. Also, check if the cabin air filter is too dirty or clogged, affecting airflow. If the problem persists, you should go to a professional repair shop. Small issues left unattended can become more costly and troublesome later, and driving safety is a big deal.
Previously, my car's air conditioning stopped working, most likely due to a broken belt or an aging compressor, or possibly the refrigerant running out. Having driven for many years, I've encountered this situation a few times. It's simple to check on your own: see if the fuse is blown, and if the switch button doesn't respond when pressed, it's likely due to contact wear; listen for the compressor's humming sound—if it's gone, it indicates an electrical control failure. A reminder to everyone: in summer, don't push through it. Stop the car and open the windows for ventilation and cooling, otherwise, it can affect concentration and significantly increase the chance of accidents. After one repair, I started maintaining the air conditioning regularly, and similar problems have become much less frequent.
