What Are the Reasons for the Car Air Conditioning Not Cooling?

[MacTheo]

The reasons for the car air conditioning not cooling are: 1. Excessive dust on the condenser, leading to reduced heat dissipation efficiency; 2. The compressor is not working; 3. Leakage of the air conditioning refrigerant; 4. The car air conditioning belt is too loose. The solutions for the car air conditioning not cooling are: 1. Repair or replace the compressor; 2. Clean the condenser; 3. Add air conditioning refrigerant; 4. Adjust the belt tension. The car air conditioning system, referred to as car AC, consists of the refrigeration system, heating system, ventilation and air purification devices, and the control system. The functions of the car air conditioning are: 1. Achieving the cooling effect through the continuous phase change cycle of the refrigerant; 2. Removing dust, odors, smoke, and toxic gases from the car's interior air, making the air inside the car fresher, and humidifying the air inside the car to increase the relative humidity.

[SanEvangeline]

Last time my car's air conditioning suddenly stopped cooling, and I almost got overheated. The main reasons are usually that the refrigerant has leaked out, or the compressor is broken. If the filter is completely clogged with dust and air can't get through, of course it won't be cool. The fan not working is also a possibility, like when the condenser doesn't dissipate heat well, causing the entire system to overheat. I once had this problem on the highway, and after checking, it turned out to be a lack of refrigerant—filling it up solved the issue. But if it's a broken belt, you need to replace it immediately, or it could damage other components. Don't forget to regularly clean the air conditioning ducts and do a comprehensive check before summer to prevent bacterial growth and save on fuel costs. These small maintenance tasks can make your driving more comfortable and safer. In short, get a professional to look at it as soon as possible to avoid delaying repairs.

[AveryMarie]

When tinkering with my car at home, I found that the most common reason for the AC not cooling is a lack of refrigerant, possibly due to a small leak in the pipes. If the compressor pump makes no sound after starting the engine, it's likely faulty. If the condenser is clogged with debris, the cooling efficiency drops, and the air blown out isn't cold. Also, a dirty AC filter restricts airflow and needs replacing. Electrical issues, like a faulty temperature sensor, can mess up the control system. I've used a pressure gauge to check refrigerant levels and topped it up when pressure was low. But for safety, avoid disassembling things randomly to prevent electric leaks or system damage. Regularly replacing the filter and cleaning the radiator can extend the AC's lifespan. A quick startup test before driving in summer can prevent sudden heat waves on the road.

[DiCalvin]

Having driven for over a decade, I've encountered several instances of air conditioning failure. It's usually due to insufficient refrigerant or a malfunctioning compressor pump. When the fan stops working or the condenser gets dirty, heat tends to accumulate and fails to dissipate. A clogged filter results in weak airflow and uncomfortably warm air. Control system malfunctions, like a faulty thermostat, can also cause the system to stop working. I remember one long trip when the AC stopped, and thankfully I had sunshades as a temporary solution. Replacing the filter annually and checking refrigerant levels can prevent major repairs. Don't tough it out in extreme heat—seek professional service to avoid health risks from hot and humid conditions inside the car.