Why doesn't water come out when the car air conditioner is turned on?
2 Answers
Introduction to the reasons why no water comes out when the car air conditioner is turned on: 1. The air conditioner needs to turn on the compressor, that is, AC cooling, to produce condensed water. 2. The air humidity is not high enough. Condensed water comes from the water vapor in the air, which condenses into water droplets when it encounters cold. If the air humidity is low, the water will mostly adhere to the pipe walls, with very little flowing down, making it almost invisible. Below is an introduction to car air conditioner maintenance: 1. Do not adjust the air conditioner vent direction randomly: When using the air conditioner, not paying attention to adjusting the direction of the air flow is not conducive to achieving the best effect. According to the principle that cold air sinks and hot air rises, the correct approach is to point the vents upward when cooling and downward when heating. 2. The air conditioner should be started regularly in winter: In some regions where winters are relatively warm, some car owners do not use the air conditioner at all during the winter. Prolonged disuse can cause the rubber seals to age, and the lubricant on the internal components of the air conditioner to dry out. Starting the air conditioner regularly allows the components to be lubricated, maintaining good condition. Therefore, it is best to start the air conditioner once a week in winter. 3. The duration of each use of the air conditioner should not be too long: Some people turn on the air conditioner as soon as they get in the car and keep it running for a long time. Prolonged use can increase the pressure on the condenser, causing wear and tear to the cooling system. Therefore, the duration of each use of the air conditioner should not be too long. If the temperature inside the car has reached a comfortable level, the air conditioner can be turned off and restarted after a while. 4. In summer, ventilate and cool down before driving, then switch to internal circulation: In hot summers, many car owners are accustomed to turning on the internal circulation of the air conditioner as soon as they get in the car, thinking that this will cool the interior faster. However, since the temperature inside the car is higher than outside, this approach is not effective. Upon entering the car, you should first open the windows for ventilation and turn on the external circulation to expel the hot air. After the interior temperature drops, you can then switch to internal circulation.
Having driven for over a decade, I've noticed that AC drainage is closely related to weather humidity. In dry summer air, the condensate produced by the AC evaporator is naturally minimal, so you won't see water dripping under the car. However, after rain or in high-humidity areas, the drain pan can accumulate half a cup of water in just a few hours. The drain tube is positioned toward the rear of the chassis, and sometimes even a small twig can block it, preventing water from draining—so regular checks are necessary. Additionally, newer cars have more optimally angled drain tubes, whereas older models are prone to water accumulation. It's advisable to have mechanics blow compressed air through the tubes during every 20,000-km maintenance to prevent odors and leaks.
