What is the reason why the warm wind in Poirot is not hot?

Polo warm air is not hot, it may be that the antifreeze is dirty, or the inferior antifreeze will rust in the tap water of the engine cylinder, which will form mud over time, leading to blockage. At this time, check whether the upper and lower pipes of the heating water tank are hot. If the heat indicates that there is no problem with the hot water supply, the problem may be that there is something wrong with the heating water tank, and the radiator pipe in the heating water tank is blocked. If the antifreeze is insufficient, it will also affect the warm air. Because the warm air uses the heat of antifreeze, the hot antifreeze enters the warm air water tank to heat the warm air water tank, and the wind is blown out into hot air through the warm air water tank. If antifreeze is insufficient, the number of Xiao Nuan water tanks affected by heated air will decrease, and the blowing wind will not be so hot.