When the water temperature of the car rises, it is not hot to turn on the warm air. Why?

In winter, the temperature will be lower and lower. When we turn on the warm air to keep warm, the water temperature inside the car will rise, but sometimes we will encounter the problem that the warm air inside the car is not very hot. There are many reasons for this, the most common ones are as follows:

1. The thermostat is opened too early, resulting in a large amount of coolant circulating, and the coolant temperature is kept at a low level; The water temperature is normal and the warm air is not hot. It may be that the pump or cooling circuit is affected by air resistance and there is something wrong with the engine cooling system.

2. Check whether the vehicle refrigerant is sufficient. If it is not enough, the heating will not get enough heat. This situation can only be solved by adding antifreeze. Some cars have water heating valves to stop the circulation of coolant when the heater is not used, so as to reduce unnecessary heat loss. If the heating water valve is damaged, the coolant may not enter the heater water tank, resulting in the heater not being hot.

When the cooling system is started, the temperature of the automobile engine is too low. It is normal that warm air will not be very hot at this time. The filter screen of air conditioner is blocked, and there is something wrong with the heating control mechanism, resulting in insufficient air volume blown into the car by the blower.

4. There is air resistance in the engine cooling system, which leads to poor circulation of the cooling system, resulting in high water temperature and not hot warm air. The cooling liquid cannot be circulated, and cannot be sent to the heater tank after heating, so that the heater is not hot. It is possible that the water pump impeller of the vehicle is damaged or lost, which leads to the decrease of water flowing through the water tank and the lack of warm air, so it is necessary to replace the water pump impeller with a new one. If the blower is seriously damaged, it is recommended to replace it directly. Car blowers rarely have problems in daily use, and there is generally no problem in inspection during maintenance.

Because all the parts of the car air conditioner are in it, it is difficult to maintain, so it is best to go to a 4S shop or a repair shop and let professional maintenance personnel solve the problem. If the water temperature is too low or too high, the engine can't work normally and the engine performance can't be exerted. When the cooling button is pressed, the air-conditioning compressor will be turned on. If the problem still exists after shutdown, it is necessary to check the water tank temperature sensor. If the cooling fan is always turned on due to sensor failure, the hot air will get cold. Generally, the normal water temperature of vehicles is between 80 and 90 degrees. In addition, the heat generated when the engine is running can not meet the requirements of conventional air cooling.