Why does the car air conditioning not cool after being exposed to the sun?
2 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.
