What is the reason why the car air conditioner does not heat, and how to solve it?

Why does the car air conditioner not heat? Why can't the air in the car heat up? 1. The car has just started and the engine temperature has not risen, so it can be warmed up; 2. Insufficient coolant; 3. The water pump is damaged; 4. The warm water tank is blocked; 5. The radiator fan is faulty. Solution: insufficient cooling liquid will also lead to no heat in the car, so add cooling liquid; The water pump is damaged, which leads to the failure of the coolant circulation system and the vehicle cannot be heated. Just replace the water pump. The hot air tank is blocked, which causes the hot water inside the engine to be unable to circulate in the tank, resulting in air heating. Just clean the hot air in the water tank. If the cooling fan fails, the cooling fan will continue to dissipate heat when it rotates frequently, which makes it difficult for the coolant in the water tank to heat up, resulting in the air not heating up. Just check and repair the radiator fan. In addition, the automobile heater uses a blower to blow heat from the small heater box 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 box cannot be dissipated, and the temperature of the warm air will not rise. Tips for car heating: 1. In winter, the temperature of the car itself is low, and it usually starts to warm up around 1 minute. After driving at a low speed for a period of time, the water temperature and oil temperature will gradually increase. When the coolant temperature rises to about 80 degrees, the air conditioner can be turned on at this time. This process varies with vehicle type and regional temperature. 2. If the air switch of the car is turned on in advance, the blower will take away the coolant temperature continuously, and the engine can only increase the fuel injection and raise the engine temperature, resulting in poor fuel economy and insufficient engine combustion, especially the slow modulation heat rate of air, which will lead to a series of problems such as shortened engine life, accelerated wear and carbon deposition over time. Million car purchase subsidy