First, in the open air, the water temperature is not normal

The normal situation is: first confirm the coolant liquid level inside the tank is appropriate; restart the engine to observe the water temperature table, the water temperature gradually increased.

Holding the water tank on the water pipe, feeling gradually warming; hand under the water pipe, the temperature is almost unchanged. When the water temperature reaches 80 ℃, the water pipe began to gradually heat up, until the same temperature with the water pipe, holding a hot feeling. The engine continues to run, the water temperature of about 95 ℃ when the electric fan began to run, the water temperature decreased slightly, about 1 minute or so stop. So repeated, this is normal.

Phenomenon 1: water temperature rise is very slow, up and down the same pipe, the car heating almost no. Reason: Baotou North Ben heavy truck accessories thermostat closed lax, even in the maintenance process was illegally removed. Solution: Replace and install the thermostat.

Phenomenon 2: After the engine heats up, the electric fan also runs, but the water temperature is higher than 95 ℃ when the water pipe temperature is slightly lower than the water pipe temperature. Reason: the thermostat opening is not enough, the cooling system has been greatly reduced the function, this situation is very common, and difficult to be noted. Solution: Replace the thermostat.

Phenomenon 3: water temperature table climbed to 95 ℃, the upper and lower pipes with the temperature and very hot. Cause: There is a problem with the fan running circuit. There are three possible: fan damage, damage to the thermal switch on the tank, damage to the insurance, insurance damage at the same time with or hidden from the early failure of the circuit or fan. Solution: replace the fan; replace the thermistor; replace the insurance and check the circuit.

Phenomenon 4: Baotou North Ben heavy truck accessories pump wheel does not work. Cause: Pump damage is also a factor, but not common. This requires more professional knowledge to judge, in this not more repeat.

Second, the air is not open when the normal water temperature, open the air after the high temperature

First judge the coolant, thermostat, thermal switch, fan, insurance and water pump are no problem. When the electric fan is stopped, open the air conditioning switch, then the fan should run immediately. Increase the throttle to the engine 2000 r / min or more, the fan should run at a higher speed.

Phenomenon 1: The fan can not run at high speed. Solution: Check the fan’s high-speed operating mechanism and control circuit.

Phenomenon 2: As Baotou North Ben heavy truck accessories condenser in front of the tank, when the tank radiator surface was catkins, dust cover, heat is not easy to shed. Jetta and Passat easy to have this failure. Solution: Clean the water tank radiator surface.

Phenomenon 3, due to long-term use may cause the tank inside the scale is blocked, lack of heat. When the above two cases are confirmed no time, you have to consider a new water tank.

Note 1: Even if the water temperature is not high, the electric fan will operate. When the air conditioner is turned on or the ambient temperature is high, the fan will run at high speed.

Note 2: to determine the conditions, the temperature should be above 30 ℃, while confirming that the air compressor does not stop. All this is to open the air conditioning after the air conditioning condenser cooling, buck.

Third, the vehicle still, the engine to idle operation, whether or not open air temperature are normal; once the normal driving, the water temperature immediately climbed

If it is in the traffic found that the water temperature is high or the water level flashing red light, and sometimes can continue to drive, and sometimes must stop waiting for maintenance.

Phenomenon 1: water level flashing red light. Judgment method: first confirm that the coolant does not lose, followed by water temperature table pointer normal. In most cases this is due to false positives. But also anxious to repair. Santana easy to have this phenomenon.

Phenomenon 2: low speed or traffic congestion when the water suddenly rose, and even boil.