What should I do if the circulation of large trucks is not good

Generally, we can consider whether the water pump and thermostat are out of order and whether the waterway is blocked. The non-circulation of cooling water has a great influence on the engine and is easy to damage the engine. There is gas in it, or the thermostat is broken, the engine water pump doesn't work and scales. Just cleaning the water tank.

The two air outlet pipes of the expansion tank are blocked or blocked. There are two thin water pipes on the top side of the expansion water tank, one connected to the branch pipe and the other connected to the water chamber of the water tank. If these two water pipes are not unblocked, the water temperature will rise and fall, rising fast and falling fast.

Internal circulation is broken, mostly because the flap motor is broken. Remove the glove box on the co-pilot's side and turn the valve of internal circulation by hand. The function of internal circulation:

1, internal circulation is to prevent the outside air from entering the car, prevent the air inside the car from being displaced to the outside, and stop the air displacement inside and outside the car.

2. Heating in winter and air conditioning in summer need to promote air circulation in the car. If the air outside is not good, you can turn on the air circulation inside the car.

3. When turning on the air conditioner heater, use the air communication mode inside and outside the car to avoid using the self-circulation mode inside the car for a long time.