Water drops often appear on the windshield of a car, and the water in the water tank is often drunk. What's the problem?

Water in the water tank and water droplets in the windshield are two different things. The water in the water tank will not pass through the air conditioning pipe in the car. The water in the water tank is often used up, so it's best to check whether the cooling system leaks. The water droplets on the windshield are caused by the cold air outlet of the air conditioner, which makes the glass cold. Water vapor in the air will condense into water drops when it meets cold glass, just like inhaling into cold glass with your mouth in winter. There are four possible reasons for the rapid consumption of water in automobile water tanks: 1. The design of cooling system is unreasonable, and generally mature cars do not exist, especially new cars do not have this problem. There is no need to consider this one. 2, leakage, generally there are very obvious traces of leakage. 3, poor circulation, fast consumption. You can ask a professional master to check it. Note that when adding antifreeze, add it after the engine temperature drops. In the process of adding, the engine must start the corresponding fuel filling valve to exhaust the gas in its system, and then it is possible to slowly add cold antifreeze, and exhaust the cooling system according to the instructions if necessary.