Why does the car air conditioner not cool or blow air when driving at high speed?
1 Answers
When a car's air conditioner does not cool or blow air while driving at high speed, it may be due to the high-speed engine causing the compressor's high-pressure protection device to trip. The compressor overload protection will trip if the system's high pressure is too high or the current is excessively hot. Alternatively, it could be issues with the refrigerant amount, an unclean air conditioning system, or moisture infiltration. Below are more reasons why a car air conditioner may not cool normally: 1. Refrigerant amount issue: Air conditioning cooling relies not only on the cooling machine but also on the refrigerant. If the car's air conditioner is overcharged with refrigerant, it can prevent normal cooling. Conversely, insufficient refrigerant will also hinder normal cooling. 2. Unclean air conditioning system: With prolonged use, cars often accumulate dust, particularly in the refrigerant and freezer, where excessive debris can obstruct cooling. This debris can also spread to other parts of the air conditioner during operation, with the filter being the most affected area. If the air conditioner is not cooling, check if the filter has accumulated too much dust. 3. Moisture infiltration: During car use, some moisture inevitably enters the air conditioning system. While a small amount of moisture does not affect normal operation, excessive accumulation can impair the cooling function.
