What are the reasons why a car air conditioner won't turn on?
4 Answers
Car air conditioner won't turn on due to: 1. Failure of the car air conditioning compressor; 2. Malfunction in the car's electronic system; 3. Damaged air conditioning button; 4. Dead battery. The components of a car air conditioner are: compressor, condenser, evaporator, liquid storage dryer, expansion valve. The function of a car air conditioner is to regulate the temperature, humidity, air cleanliness, and air flow inside the car cabin. The working principle of car air conditioner heating is: When the car's engine water temperature becomes too high, the refrigerant gas enters the condenser, where pressure and temperature decrease, the refrigerant gas condenses into liquid, and heat is discharged.
It's really annoying when the air conditioning won't turn on. I've encountered this issue before when driving. Here are possible causes: First, it might be a blown fuse - try finding and replacing the corresponding one in the front fuse box. Second, if the refrigerant has leaked or is insufficient, the compressor won't work, and you'll need to visit a shop for a refill. Third, the fan blades might be stuck or broken, preventing airflow - check if the fan under the hood is spinning. Alternatively, there could be poor contact with the control buttons or wiring - try pressing them gently to see if there's any response. Finally, the system might be too old and clogged. When checking yourself, don't rush to dismantle anything; start with simple solutions first. Remember to maintain your AC regularly, such as cleaning the filter every six months, to minimize problems.
Oh, my car's air conditioner also crashed when I first bought it. There are many possible reasons: unstable car battery voltage causing the system to lose power and fail to start; a broken air conditioner compressor, which may produce strange noises; a faulty fan motor resulting in weak airflow; refrigerant leakage due to loose pipes; or a malfunctioning control panel that doesn’t respond when pressed. This issue is no small matter—driving in summer without air conditioning can be dangerously hot. If you notice any problems, pull over immediately, open the windows for ventilation, and head straight to a 4S shop or professional repair center to get it checked. Don’t delay and suffer unnecessarily. Also, try to avoid parking in direct sunlight to reduce the load on your air conditioner.
AC not working? Troubleshoot immediately. First, check if the fan is spinning—no movement may indicate a blown fuse or relay failure. Next, listen for the compressor startup sound; no noise could mean insufficient refrigerant or a blockage. If the button lights up after operation, the switch is fine, but loose wiring connections may need tightening. Older models are prone to component aging and cracks. You can try restarting the car or simple fixes yourself, but if the issue persists, avoid unnecessary tinkering and head to a repair shop to save time and money.
