During the warranty period, it can be handled according to the test results of 4S shop. In addition, in addition to the problem of the water tank itself, the blockage of the warm water tank is also closely related to the cooling water used. It is recommended to use original coolant, and it is not recommended to mix different brands of cooling water. If mixed together, it is easy to cause blockage caused by scale. The first replacement cycle of original blue antifreeze is 8 years or 654.38+0.6 million kilometers. Every two years or 40 thousand kilometers, it is necessary to check the mixing ratio of antifreeze and adjust the mixing ratio as appropriate. Just check whether there is a shortage during regular maintenance. It's normal when the car is cold. If the antifreeze is not greatly reduced, you can add a small amount of mineral-free water or distilled water as a supplement. If the consumption is relatively large, you need to buy original antifreeze to supplement it. The original antifreeze is a premixed (mixing ratio is 50%) coolant, which can be used below -35℃. If distilled water is added many times, the low temperature performance will be affected. For example, when the mixing ratio is only 30%, the coolant can only be used above-15℃, and it may be necessary to replace it in advance in extremely congested areas, or use super-concentrated special coolant.