Pentium B50 heating box

There are two main reasons why the general car warm air is not hot enough after it is turned on. There is something wrong with the cooling system of the engine or the control mechanism of the warm air, which can't work normally. The owner can check the temperature of the two inlet pipes of the warm air small water tank. If both are hot enough, there is nothing wrong with the heating control mechanism. If it's all cold or hot and cold, it's a cooling system.