Why does the Volkswagen Tiguan's fan not turn and the water temperature rise?
2 Answers
Volkswagen Tiguan's high water temperature with the fan not turning is mainly due to the electronic fan failing to start. After troubleshooting the electronic fan issue, the water temperature will return to normal. Inspection methods for non-working electronic fan: First, check if the connector has poor contact, inspect the power supply and grounding of the electronic fan, check if the fan is stuck, and verify if the fan motor is burnt out. These factors can all prevent the electronic fan from starting. It is recommended to take the vehicle to a 4S shop for timely inspection and repair, and only drive after the issue is resolved. Working principle of the electronic fan: The car's electronic fan is controlled by a thermostat. When the water temperature rises to the upper limit, the thermostat connects the power supply, and the fan starts working. When the water temperature drops to the lower limit, the thermostat cuts off the power supply, and the fan stops working.
My Volkswagen Tiguan previously had a fan failure causing the water temperature to soar. Upon careful inspection, it was found to be due to aging of the fan motor. The core function of the fan is cooling, activated by signals from the water temperature sensor. Other potential causes include relay sticking or fuse burnout, typically located in the engine compartment fuse box. Overheating is extremely dangerous as it can lead to piston deformation, affecting overall engine performance. I recommend not driving the car; instead, stop immediately, open the hood to dissipate heat, and check if the fuse is burnt. If the issue is simple, replace the fuse yourself. For more complex problems like wiring short circuits, seek professional diagnosis to avoid major engine repairs. Regularly clean the radiator fan to reduce dust buildup and prevent overheating.
