Why is the water temperature light of Dongfeng Shen Feng truck always on and gives an alarm?

Check whether the small water tank (behind the cab) is short of water and whether the bottom of the small water tank is short of water.

Water level indicating sensor

Whether the plug wire is in poor contact or falls off, if it is in good condition, remove the water level sensor at the bottom of the small water tank to see if the sensor surface is rusty, remove rust to expose the metal surface (this is caused by adding water, and antifreeze will not rust), and install the sensor connection.

Good lines

. If not, I'm asking.

He uses water temperature and water level alarms. Sometimes judging that the water temperature is high is actually caused by the low water level.