What are the reasons for poor cooling performance in car air conditioning?
2 Answers
Car air conditioning poor cooling performance may be caused by the following reasons: 1. Insufficient or low refrigerant: A common cause of car air conditioning not cooling is insufficient or low refrigerant, likely due to minor leaks. 2. Excessive refrigerant: The proportion of refrigerant in the air conditioning system must meet specific requirements. If the proportion is too high, it can affect heat dissipation. Similarly, adding too much cooling oil during maintenance can also reduce the heat dissipation of the refrigeration system. 3. Loose drive belt of the car air conditioning compressor: Car refrigeration relies on refrigerant, which is transported by the air conditioning compressor, and the drive belt is a crucial moving part that drives the compressor. If the drive belt is loose, the compressor may slip during operation, leading to reduced transmission efficiency, decreased compressor speed, and reduced refrigerant delivery, resulting in poor cooling performance of the car air conditioning.
Once when helping a friend inspect a car, I encountered an issue where the air conditioning wasn't cooling. Common causes include insufficient refrigerant or leaks, which may be due to aging AC pipes or loose connections. Compressor problems are also frequent, such as electromagnetic clutch failure leading to compression failure, or internal compressor wear affecting cooling efficiency. If the condenser is clogged with dust or leaves, causing poor heat dissipation, cold air won't circulate. A dirty filter can obstruct airflow, resulting in low air volume but poor cooling. Setting the temperature too high or using the external circulation mode can also hinder performance. I recommend regularly checking refrigerant pressure, performing AC maintenance every two years, cleaning the condenser, and replacing the filter. Ignoring these issues can make long drives uncomfortably hot, even increasing the risk of heatstroke. Safety first—address these problems promptly.
