First, the car water temperature sensor is broken fault judgment:
1, due to the normal rotation of the fan, first check whether the waterway is blocked
2, remove the thermostat (the temperature is high most of the high temperature is caused by the thermostat)
3, if you can not solve then replace the water temperature sensor
Second, if the water temperature sensor is broken, there will be several situations:
a The water temperature sensor is short-circuited or the line is short-circuited. The water temperature gauge pointer points directly to the highest position
b The water temperature sensor is shorted or the line is shorted. The water temperature gauge pointer does not move
c The water temperature sensor is contaminated. The water temperature is inaccurate.