Why does the car air conditioning not cool after being exposed to the sun?
4 Answers
The reason why the car air conditioning does not cool after being exposed to the sun is due to high pressure or overheating. The causes of high pressure or overheating are: 1. Excessive refrigerant: The refrigerant amount can be appropriately reduced. 2. Poor heat dissipation: Check if there is dust or dirt on the condenser pipe, and it is recommended to clean the condenser. 3. Blockage in the pipeline system: Refer to the pressure gauge for judgment and elimination, and reprocess the system. 4. Dust or scale accumulation on the evaporator or filter: This reduces airflow, causing imbalance in system pressure and temperature. It is recommended to clean the evaporator or filter. 5. Lack of refrigerant: When there is a lack of refrigerant, the compressor exhaust temperature will overheat, causing the overheating load protection switch to trip.
Last month, my car was parked under the sun for half a day, and when I started the AC, it blew hot air, which was absolutely unbearable. Later, I went for a check-up and found that the refrigerant was insufficient, possibly because prolonged exposure to the sun caused changes in system pressure, expanding the leakage point. Additionally, the radiator surface had accumulated a lot of dust, preventing the heat from dissipating and greatly reducing cooling efficiency. I always neglect the AC filter, and when it's clogged, it also affects airflow. I recommend using a sunshade when parking in summer and opening the windows for a few minutes to ventilate before turning on the AC after exposure to the sun. Regular maintenance is crucial—check the coolant and filter every six months to avoid costly repairs on the road.
My old car often had this issue – the AC would stop cooling after being exposed to scorching summer heat. Upon inspection, it was usually due to wiring problems or a stuck fan. High temperatures put a heavy load on the system, making minor flaws more apparent. From personal experience, I recommend pulling over immediately to check. Feel the components under the hood for overheating – sometimes a simple dust cleaning can fix it. For prevention, I make it a habit to park in shaded areas or use a windshield cover. Developing these habits has saved me a lot on repairs and avoided the frustration of driving in discomfort.
The most common causes of air conditioning not cooling are refrigerant leaks or radiator blockages. After exposure to intense sunlight, high temperatures increase system pressure, leading to abnormal compressor operation. A dirty filter also affects airflow, resulting in poor cooling performance. It is recommended to first open the windows to dissipate heat before turning on the air conditioning, allowing the cooling system to stabilize. Regular inspections can help prevent these issues.
