Why does the Touareg's electric fan keep running?

[KingRose]

The Touareg's electric fan keeps running and may require replacement of the coolant temperature sensor. The coolant temperature and level sensor consists of a thermostat section and a water level control section, accompanied by a pressure-reducing device before the electric valve and a rotary muffler heater for heating. 1. Principle: The water level sensor inside the container transmits the sensed water level signal to the controller. The computer within the controller compares the actual water level signal with the set signal, calculates the deviation, and then issues "open" or "close" commands to the water supply electric valve based on the nature of the deviation, ensuring the container reaches the set water level. 2. Safety Measures: Only when the set temperature is reached does the controller issue a command to close the valve and cut off the heat source, putting the system into a heat preservation state. During the programming process, it ensures that the electric regulating valve controlling the heat source does not open unless the system reaches a safe water level, thereby avoiding heat loss and preventing accidents.