1, the thermostat is always on or the thermostat is turned on too early, which makes the cooling system carry out a big cycle prematurely, and the outside temperature is very low, especially when the car is driving, the cold air quickly cools the antifreeze, the engine water temperature does not rise, and the warm air does not heat up.
2. The water pump impeller is damaged or lost, so that the flow through the warm air small water tank is not enough, and the heat can't come up.
3. There is air resistance in the engine cooling system, which leads to poor circulation of the cooling system, resulting in high water temperature and lukewarm 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 heating tank is very hot and the outlet pipe is very cold, this situation should be that the small heating tank is blocked and should be replaced.
The automobile heating system blows cold air to the surface of the heat exchanger, absorbs its heat and introduces it into the car, thus increasing the temperature inside the car.
The heat source of water heating system comes from engine coolant, and water heating system is mostly used in cars, trucks and buses with low heating requirements. Water heating and warm air system is mainly composed of heater, hot water regulating valve, blower and control panel.
Among them, the blower is composed of adjustable speed DC motor and squirrel cage fan, which is used to blow cold air to the heater, and the cold air is heated and sent into the car. By adjusting the speed of the motor, the air supply to the compartment can be adjusted.
(Photo/Text/Photo: Pacific Auto Network Q&A called Beast)