1, the cooling system of the engine is blocked by air, which leads to the problem that the cooling circulation system of the automobile cannot work normally and the warm air is not hot. If the inlet pipe is warm, the small water tank is hot, the outlet pipe is cold, and 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 water flow through the water tank and makes the warm air not hot, so it needs to be replaced with a new water pump impeller.
3. There is air resistance in the engine cooling system, which leads to poor circulation of the cooling system, high water temperature, warm air and other faults. If there is gas in the cooling system all the time, it is likely that the cylinder pad has damaged the cooling system.
If the inlet pipe of the small heating tank is very hot and the outlet pipe is relatively cold, this situation should be that the small heating tank is blocked and should be replaced.
Warm air is not a hot solution;
The car's warm air is to blow the heat in the warm air tank to the cab through the blower.
If the air volume is insufficient or the distribution of cold and hot air is not good, the heat in the hot air tank will not be radiated, and the temperature of hot air will not come up. At this point, first check whether the filter element is dirty and blocked, clean it up and replace it in time if necessary; Then check the operation of each gear of the blower, and each gear should reach sufficient speed.
If the knob position is adjusted to warm air, the air volume is large enough and the wind direction is normal, and cold air is blown out, it is necessary to check the warm waveform of cold and hot air to see whether the flap cable falls off, whether the warm air impeller is damaged, whether the flap falls off, etc. , the warm air will eliminate the fault after heating.
Extended data:
Precautions:
Don't smoke in the car: Smoking in a car with hot air will make a lot of amine and nicotine smoke adhere to the evaporator of the car air conditioner. If there is no air conditioner for a long time or it rains, mold will be produced on the evaporator surface.
Make a small opening in the rear window of the vehicle to let the dirty air in the vehicle out. Or in the case of turning on the air conditioner, warm air can be circulated, and one machine can be used for multiple purposes to ensure that fresh air outside the car continues to enter the car.
References:
People's Network-Why is it so cold? In winter, the air conditioner and warm air are not hot as hell.