Why is the c30 warm air of the Great Wall not hot?

The vehicle heating system is not hot, which is divided into two reasons: one is caused by the engine cooling system, and the other is caused by the poor operation of the heating control mechanism. When maintaining, we must first determine which cause it is, and then carry out corresponding maintenance. The method of discrimination is simple. Look at the temperature of the two inlet pipes of the warm air small water tank. If both pipes are hot enough, there is something wrong with the air flow control mechanism. On the contrary, if both pipes are cold, or one pipe is hot and the other is cold, it is a problem with the cooling system. \x0d\ The possible problems of the cooling system are as follows: \x0d\ 1. The thermostat is often turned on or turned on too early, which leads to a large cycle of the cooling system too early, and the outside temperature is very low. Especially when the car is driving, the cold air will quickly cool the antifreeze, and the engine water temperature will not rise, and the warm air will not rise. \x0d\ Second, the water pump impeller is damaged or lost, which makes the flow through the small warm air water tank insufficient and the heat can't come up. \x0d\ Thirdly, there is air resistance in the engine cooling system, which leads to poor circulation of the cooling system, resulting in high water temperature and warm air. If there is gas in the cooling system all the time, it is likely that the cylinder pad is damaged and the gas leaks into the cooling system; If the inlet pipe of the small warm air tank is very hot and the outlet pipe is very cold, this situation should be that the small warm air tank is blocked and should be replaced. \ x0d \ x0d \ The heater in the car uses a blower to blow the heat from the heater water tank into the cab. If the air volume is insufficient or the distribution of cold and hot air is not good, the heat of the small warm air tank will not be radiated, and the temperature of the warm air will not come up. Check whether the filter is dirty or blocked, clean the filter and replace it in time if necessary. Then check the operation of each gear of the blower, and each gear must reach sufficient speed. If the knob is set to the warm air position, the air volume \x0d\ is large enough and the wind direction is normal, and cold air is blown out, check whether the cable of hot and cold air control flap in the warm air box falls off, whether the warm air impeller is damaged, whether the flap falls off, etc. After troubleshooting, the warm air will get hot.