The reason why warm air is not hot when the water temperature comes up is:
1, engine cooling system failure: just replace the thermostat;
2. Insufficient antifreeze: add enough antifreeze;
3, cooling circulation system failure: just replace the radiator. The working principle of automobile heating system is: a set of devices that blow cold air to the surface of heat exchanger, absorb its heat and introduce it into the car, thus increasing the temperature inside the car. The function of automobile heating system is:
1, which provides heating for the car and increases the temperature inside the car;
2. defrost. When the humidity in the air is high and the temperature difference between the inside and outside of the car is large, frost and fog will form on the window glass, which will affect the driver's sight. Automobile heating system is divided into:
1, water heating system;
2. Warm air heating system;
3. Independent combustion heating system;
4. Integrated preheating and heating system.
1. The cooling system of the engine is blocked by air, which leads to the problem that the cooling circulation system of the automobile can't work normally and the warm air is not hot. If the inlet pipe of the warm air small water tank is hot and the outlet pipe is cold, it means that the small water tank is blocked and needs to be replaced.
2. The water pump impeller of the vehicle is damaged or lost, which reduces the amount of water in the water tank and causes the warm air not to be hot, so it is necessary to replace the new water pump impeller.
3. It is also possible that the thermostat has been turned on or turned on too early, which leads to the early circulation of the cooling system, the low temperature outside the car, and the rapid cooling of the antifreeze by the cold air outside, resulting in insufficient temperature rise of the water tank and insufficient warm air. The thermostat needs to be adjusted or repaired.
Matters needing attention when buying a car are as follows:
1, confirm purchasing power: confirm purchasing power. After buying a car, it will not affect the overall quality of life of the family. Generally, according to the average income of the family in the past three years, 20% of the family in the past three years will be taken out, but it will not exceed 10% of the family's fixed assets.
2. Concerns: The most important thing for family cars is safety, followed by economic applicability. Because the safety of a car carries the life of a family, safety is the most important thing.
3. On-site confirmation: basically confirm several models to be bought according to the above two steps, and personally go to the 4s shop for on-site confirmation, including test drive, inquiry, loan situation, maintenance and other related information.