Why is there no air coming from the car's heating system?

[LeOmar]

The reasons why the car's heating system is not blowing air are as follows: 1. The thermostat is damaged, causing the cooling system to enter the large circulation cycle prematurely. 2. The air filter is dirty and clogged, affecting the heating performance. 3. The heating control button is damaged and cannot transmit the corresponding heating supply signal. 4. The small heating radiator is blocked, preventing coolant from passing through it. 5. The water pump impeller is damaged or slipping, resulting in insufficient flow through the small heating radiator. Here are the functions of the car's heating system: 1. Provides warmth to the car interior, increasing the temperature inside the vehicle. 2. Can defrost windows. The working principle of the car's heating system is: a complete set of devices that blows cold air onto the surface of the heat exchanger, absorbs its heat, and directs it into the car, thereby raising the temperature inside the vehicle.