What are the reasons for a car's air conditioning not cooling?
2 Answers
Reasons for a car's air conditioning not cooling: 1. Lack of refrigerant; 2. Damaged air conditioning flap; 3. Dirty condenser; 4. Damaged air conditioning compressor, throttle valve, or expansion valve; 5. Aged or loose belt; 6. Water in the pipeline; 7. Leakage in the air conditioning system pipeline; 8. Blocked condenser fins or excessively high system temperature, resulting in poor cooling effect, etc. Things to note for cleaning and using car air conditioning: 1. The air filter is used to filter dust, pollen, and bacteria in the air, effectively preventing the air conditioning system from being polluted by external factors. The filter needs to be cleaned or replaced. 2. The refrigerant level can be checked through the drying bottle or the glass sight glass on the air conditioning pipeline. 3. Do not open the internal and external pipelines of the car by yourself.
There are many possible reasons why a car's air conditioning isn't cooling properly. In my experience, the most common issue is insufficient refrigerant, which can leak over time and result in poor cooling performance. Problems with the compressor are also frequent—if it fails, the entire system shuts down, and the absence of the usual humming sound may indicate this issue. Another common culprit is a dirty or clogged condenser, where dust or debris blocks proper heat dissipation. A malfunctioning fan motor is another factor; if it stops blowing air during hot summer days, cooling efficiency drops significantly. Smaller components can also cause trouble, such as a clogged cabin air filter restricting airflow or a stuck expansion valve disrupting the refrigeration cycle. From my years of repairing cars, I've found that loose electrical connections often contribute to AC failures. When diagnosing, start by checking refrigerant pressure and inspecting the filter location. If you're unsure, it's best to visit a professional shop to avoid unnecessary hassle. In short, address the problem early—driving in hot weather without AC is miserable!
