Car engine and air-conditioning system have poor heat dissipation, resulting in excessively high water temperature. The following fault phenomena and solutions will occur: 1. When the traffic is not smooth-traffic jam or long idling, the engine water temperature gauge shows too high, and the electronic fan works in high-speed gear. If it is too long, the engine noise will increase. If the temperature is too high, the malfunction* will be obvious when the air conditioner is turned on. Related reading: Scientific and reasonable maintenance of your car helps you save unnecessary money and avoid ten misunderstandings in car maintenance
Solution: After the car is hot, check the water return of the return pipe at the upper end of the antifreeze storage tank. If the return water is not smooth or blocked, the water temperature will be too high.
Reminder: Do not blindly disassemble and replace parts during maintenance.
2. When the air temperature is too high and the air conditioner is turned on, the idling speed is unstable and the speed fluctuates too much, the acceleration is weak, and the engine makes abnormal noise.
Solution: Check whether there is too much dust between the condenser and the water tank, and clean it thoroughly with high-pressure air to ensure that the water tank and the condenser have good heat dissipation performance.
Reminder: usually pay attention to wipe the dust between the condenser and the water tank.
3. After a hot car is turned off for more than ten minutes, it is not easy to start the car; when a hot car is running, it will sometimes turn off automatically.
Solution: When the car is hot, check the temperature difference between the upper and lower water pipes of the water tank. If the temperature difference is too large, you need to check the opening of the thermostat and whether the water pump has rotation speed failure.
Reminder: The temperature difference between the upper and lower water pipes of the water tank should not be too large.
4. When the car is cold, the air-conditioning refrigeration temperature is very cool, and the cooling effect of the air-conditioning is not obvious when the car is hot; and there is a large resonance hum in the air-conditioning system.
Solution: Due to the irregular addition and replacement of antifreeze, the engine water channel and water tank will be blocked in advance and the water temperature will be high. The antifreeze is replaced once every two years, and original parts must be used when replacing and adding.
Reminder: After adding water to the engine cooling system, or the concentration of the added antifreeze exceeds 60%, it will cause the water temperature to be too high.
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Link to this article：How to solve the poor heat dissipation of automobile engines and air conditioning systems
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